Author
Number of items: 162.
2017
The deep OB-star population in Carina from the VST Photometric H-alpha Survey (VPHAS+). (2017)
M. Mohr-Smith,
Janet Drew,
Ralf Napiwotzki,
S. Simon-Diaz,
N. J. Wright,
Geert Barentsen,
J. Eisloeffel,
Hywel Farnhill,
R. Greimel,
Maria Monguio,
V. Kalari,
Q. A. Parker
and
Jorick S. Vink
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2016
A search for white dwarfs in the Galactic plane: : the field and the open cluster population. (2016)
R. Raddi,
S. Catalan,
B. T. Gaensicke,
J. J. Hermes,
R. Napiwotzki,
D. Koester,
P. -E. Tremblay,
G. Barentsen,
H. J. Farnhill,
M. Mohr-Smith,
J. E. Drew,
P. J. Groot,
L. Guzman-Ramirez,
Q. A. Parker,
D. Steeghs
and
A. Zijlstra
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2015
Discovery of a brown dwarf companion to the A3V star β Circini. (2015)
Leigh Smith,
P.W. Lucas,
C. Contreras Peña,
R. Kurtev,
Federico Marocco,
H.R.A. Jones,
J.C. Beamin,
Ralf Napiwotzki,
J. Borissova,
B. Burningham,
J. Faherty,
D.J. Pinfield,
M. Gromadzki,
V.D. Ivanov,
D. Minniti,
W. Stimson
and
V. Villanueva
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New OB star candidates in the Carina Arm around Westerlund 2 from VPHAS+. (2015)
M. Mohr-Smith,
J.E. Drew,
G. Barentsen,
N. J. Wright,
R. Napiwotzki,
R.L.M. Corradi,
J. Eislöffel,
P. Groot,
V. Kalari,
Q. A. Parker,
Roberto Raddi,
S. E. Sale,
Y.C. Unruh,
J. S. Vink
and
R. Wesson
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Spectral classification of photometrically selected AGB candidates in NGC 6822. (2015)
L. F. Sibbons,
Sean G. Ryan,
Ralf Napiwotzki
and
G. P. Thompson
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The AGB population in IC 1613 using JHK photometry. (2015)
L. F. Sibbons,
Sean G. Ryan,
M. Irwin
and
R. Napiwotzki
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2014
The first planet detected in the WTS : an inflated hot-Jupiter in a 3.35 day orbit around a late F-star [ERRATUM]. (2014)
M. Cappetta,
R.P. Saglia,
J. L. Birkby,
J. Koppenhoefer,
D.J. Pinfield,
S.T. Hodgkin,
P. Cruz,
G. Kovacs,
B. Sipocz,
D. Barrado,
B. Nefs,
Y. V. Pavlenko,
L. Fossati,
C. del Burgo,
E. L. Martin,
I. Snellen,
J. Barnes,
D. A. Campbell,
S. Catalan,
M. C. Galvez-Ortiz,
N. Goulding,
C. Haswell,
O. Ivanyuk,
H.R.A. Jones,
M. Kuznetsov,
N. Lodieu,
F. Marocco,
D. Mislis,
F. Murgas,
R. Napiwotzki,
E. Palle,
D. Pollacco,
L. Sarro Baro,
E. Solano,
P. Steele,
H. Stoev,
R. Tata
and
J. Zendejas
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Ultraviolet-excess sources with a red/infrared counterpart : Low-mass companions, debris discs and QSO selection. (2014)
K. Verbeek,
Paul J. Groot,
Simone Scaringi,
Jorge Casares,
Jesus M. Corral-Santana,
Niall Deacon,
J.E. Drew,
B.T. Gänsicke,
E. Gonzalez-Solares,
R. Greimel,
U. Heber,
R. Napiwotzki,
R.H. Ostensen,
D. Steeghs,
N.J. Wright
and
A. Zijlstra
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2013
A determination of the space density and birth rate of hydrogen-line (DA) white dwarfs in the Galactic plane, based on the UVEX survey. (2013)
Kars Verbeek,
Paul J. Groot,
Gijs A. Nelemans,
Simone Scaringi,
R. Napiwotzki,
J.E. Drew,
D.T.H. Steeghs,
Jorge Casares,
J.M. Corral-Santana,
Boris T. Gänsicke,
E.A. González-Solares,
Robert Greimel,
Ulrich Heber,
Mike J. Irwin,
Christian Knigge,
N.J. Wright
and
Albert Zijlstra
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High Galactic latitude runaway stars as tracers of the spiral arms. (2013)
M.D.V. Silva
and
Ralf Napiwotzki
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The detection of an older population in the Magellanic Bridge. (2013)
Gemma Bagheri,
M-R.L. Cioni
and
Ralf Napiwotzki
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2012
Spectroscopic follow-up of ultraviolet-excess objects selected from the UVEX survey. (2012)
K. Verbeek,
P.J. Groot,
S. Scaringi,
G. Nelemans,
R. Napiwotzki,
B. Spikings,
J.E. Drew,
R.H. Østensen,
D. Steeghs,
B.T. Gänsicke,
J. Casares,
J.M. Corral-Santana,
R.L.M. Corradi,
Niall Deacon,
J.J. Drake,
E. González-Solares,
M.J. Irwin,
R. Greimel,
U. Heber
and
C. Knigge
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The brightest pure-H ultracool white dwarf. (2012)
S. Catalan,
P. -E. Tremblay,
D.J. Pinfield,
Leigh Smith,
Z. H. Zhang,
R. Napiwotzki,
F. Marocco,
A. C. Day-Jones,
J. Gomes,
K.P. Forde,
P.W. Lucas
and
H.R.A. Jones
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MUCHFUSS - massive unseen companions to hot faint underluminous stars from SDSS. (2012)
S. Geier,
V. Schaffenroth,
H. Hirsch,
A. Tillich,
U. Heber,
P. F. L. Maxted,
R. H. Ostensen,
B. N. Barlow,
S. J. O'Toole,
T. Kupfer,
T. Marsh,
B. Gaensicke,
R. Napiwotzki,
O. Cordes,
S. Mueller,
L. Classen,
E. Ziegerer
and
H. Drechsel
The AGB population of NGC 6822 : Distribution and the C/M ratio from JHK photometry. (2012)
L. F. Sibbons,
Sean G. Ryan,
M-R.L. Cioni,
M. Irwin
and
R. Napiwotzki
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2011
New short-period stellar pulsators at large Galactocentric distances. (2011)
G. Ramsay,
T. Barclay,
R. Napiwotzki,
T. Barclay,
M. Cropper,
P. Hakala
and
S. Potter
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Stellar variability on time-scales of minutes: results from the first 5 yr of the Rapid Temporal Survey. (2011)
Thomas Barclay,
Gavin Ramsay,
Pasi Hakala,
Ralf Napiwotzki,
Gijs Nelemans,
Stephen Potter
and
Ian Todd
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The magnetic and metallic degenerate G77-50. (2011)
J. Farihi,
P. Dufour,
R. Napiwotzki
and
D. Koester
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The VMC survey I. Strategy and first data. (2011)
M-R.L. Cioni,
G. Clementini,
L. Girardi,
R. Guandalini,
M. Gullieuszik,
B. Miszalski,
M.I. Moretti,
V. Ripepi,
S. Rubele,
G. Bagheri,
K. Bekki,
N.J.G. Cross,
W.J.G. de Blok,
R. de Grijs,
J.P. Emerson,
C.J. Evans,
B. Gibson,
E. Gonzales-Solares,
M.A.T. Groenewegen,
M.J. Irwin,
V.D. Ivanov,
J. Lewis,
M. Marconi,
J-B. Marquette,
C. Mastropietro,
B. Moore,
R. Napiwotzki,
T. Naylor,
J.M. Oliveira,
M. Read,
E. Sutorius,
J.T. van Loon,
M.I. Wilkinson
and
P.R. Wood
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A white dwarf companion to the relativistic pulsar PSR J1141-6545. (2011)
J. Antoniadis,
C. G. Bassa,
N. Wex,
M. Kramer
and
R. Napiwotzki
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Binaries discovered by the MUCHFUSS project SDSS J08205+0008 - An eclipsing subdwarf B binary with brown dwarf companion. (2011)
S. Geier,
V. Schaffenroth,
H. Drechsel,
U. Heber,
T. Kupfer,
A. Tillich,
R. Ostensen,
K. Smolders,
P. Degroote,
P.F.L. Maxted,
B.N. Barlow,
B.T. Gansicke,
T.R. Marsh
and
R. Napiwotzki
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Binaries discovered by the SPY survey VI : Discovery of a low mass companion to the hot subluminous planetary nebula central star EGB5-a recently ejected common envelope? (2011)
S. Geier,
R. Napiwotzki,
U. Heber
and
G. Nelemans
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Brown dwarf companions to white dwarfs. (2011)
Matt R. Burleigh,
Paul R. Steele,
Paul D. Dobbie,
Jay Farihi,
Ralf Napiwotzki,
Pierre F. L. Maxted,
Martin A. Barstow,
Richard F. Jameson,
Sarah L. Casewell,
Boris T. Gaensicke
and
Tom R. Marsh
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Discovery of a T dwarf + white dwarf binary system. (2011)
Avril Day-Jones,
D.J. Pinfield,
M. Ruiz,
H. Beaumont,
B. Burningham,
J. Gallardo,
A. Gianninas,
P. Bergeron,
Ralf Napiwotzki,
J.S. Jenkins,
Z.H. Zhang,
D.N. Murray,
Silvia Catalan
and
Joana Ines Gomes
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Ejection velocities of high galactic latitude runaway stars. (2011)
M.D.V. Silva
and
Ralf Napiwotzki
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Evolved solar systems in Praesepe. (2011)
Sarah L. Casewell,
Matt R. Burleigh,
Paul D. Dobbie
and
Ralf Napiwotzki
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The Hyper-MUCHFUSS project : probing the Galactic halo with sdB stars. (2011)
A. Tillich,
U. Heber,
S. Geier,
H. Hirsch,
P.F.L. Maxted,
B.T. Gansicke,
T.R. Marsh,
R. Napiwotzki,
R. Ostensen
and
R.D. Scholz
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IPHAS extinction distances to planetary nebulae. (2011)
C. Giammanco,
S.E. Sale,
R.L.M. Corradi,
M.J. Barlow,
K. Viironen,
L. Sabin,
M. Santander-Garcia,
D.J. Frew,
R. Greimel,
B. Miszalski,
S. Phillipps,
A.A. Zijlstra,
A. Mampaso,
J.E. Drew,
Q.A. Parker
and
R. Napiwotzki
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Improved prospects for the detection of new Large Magellanic Cloud planetary nebulae. (2011)
B. Miszalski,
R. Napiwotzki,
M-R.L. Cioni
and
J. Nie
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The MUCHFUSS project - Searching for hot subdwarf binaries with massive unseen companions : survey, target selection and atmospheric parameters. (2011)
S. Geier,
H. Hirsch,
A. Tillich,
P.F.L. Maxted,
S.J. Bentley,
R. Ostensen,
U. Heber,
B.T. Gansicke,
T.R. Marsh,
R. Napiwotzki,
B.N. Barlow
and
S. O'Toole
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Massive unseen companions to hot faint underluminous stars from SDSS (MUCHFUSS) - Analysis of seven close subdwarf B binaries. (2011)
S. Geier,
P.F.L. Maxted,
R. Napiwotzki,
R. Ostensen,
U. Heber,
H. Hirsch,
T. Kupfer,
S. Muller,
A. Tillich,
B.N. Barlow,
R. Oreiro,
T.A. Ottosen,
C. Copperwheat,
B.T. Gansicke
and
T.R. Marsh
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Substellar companions and the formation of hot subdwarf stars. (2011)
Stephan Geier,
Ulrich Heber,
Alfred Tillich,
Heiko Hirsch,
Thomas Kupfer,
Veronika Schaffenroth,
Lew Classen,
Pierre F. L. Maxted,
Roy H. Ostensen,
Brad N. Barlow,
Tom R. Marsh,
Boris T. Gaensicke,
Ralf Napiwotzki,
Simon J. O'Toole
and
Eike W. Guenther
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The VMC survey II : A multi-wavelength study of LMC planetary nebulae and their mimics. (2011)
Brent Miszalski,
Ralf Napiwotzki,
M-R.L. Cioni,
M.A.T. Groenewegen,
J.M. Oliveira
and
A. Udalski
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2010
Anyone out there? Galactic halo post-AGB stars. (2010)
S. Weston,
R. Napiwotzki
and
S. Catalan
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Binaries discovered by the SPY project: V. GD 687 – a massive double degenerate binary progenitor that will merge within a Hubble time. (2010)
S. Geier,
U. Heber,
T. Kupfer
and
R. Napiwotzki
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Discovery of the first white dwarf + T dwarf binary system and the use of white dwarfs as age calibrators. (2010)
Avril Day-Jones,
D.J. Pinfield,
M. Ruiz,
H. Beaumont,
J. Gallardo,
A. Gianninas,
P. Bergeron,
Ralf Napiwotzki,
J.S. Jenkins,
B. Burningham,
Z.H. Zhang,
H.R.A. Jones,
D. Murray,
Silvia Catalan
and
Joana Ines Gomes
Hot subdwarf stars in close-up view. I. Rotational properties of subdwarf B stars in close binary systems and nature of their unseen companions. (2010)
S. Geier,
U. Heber,
P. Podsiadlowski,
H. Edelmann,
R. Napiwotzki,
T. Kupfer
and
S. Muller
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Search for the coolest white dwarfs in the Galaxy. (2010)
S. Catalan,
R. Napiwotzki,
S.T. Hodgkin,
D.J. Pinfield
and
D.C. Hornillos
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The chemical composition of TS 01, the most oxygen-deficient planetary nebula AGB nucleosynthesis in a metal-poor binary star. (2010)
G. Stasinska,
C. Morisset,
G. Tovmassian,
T. Rauch,
M.G. Richer,
M. Pena,
R. Szczerba,
T. Decressin,
C. Charbonnel,
L. Yungelson,
R. Napiwotzki,
S. Simon-Diaz
and
L. Jamet
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The double-degenerate nucleus of the planetary nebula TS 01: a close binary evolution showcase. (2010)
G. Tovmassian,
L. Yungelson,
T. Rauch,
V. Suleimanov,
R. Napiwotzki,
G. Stasinska,
J. Tomsick,
J. Wilms,
C. Morisset,
M. Pena
and
M.G. Richer
The orbital period of V458 Vulpeculae, a post-double common-envelope nova. (2010)
P. Rodriguez-Gil,
M. Santander-Garcia,
C. Knigge,
R.L.M. Corradi,
B.T. Gansicke,
M.J. Barlow,
J. Drake,
J.E. Drew,
B. Miszalski,
R. Napiwotzki,
D. Steeghs,
R. Wesson,
A.A. Zijlstra,
D.H. Jones,
T. Liimets,
T. Munoz-Darias,
S. Pyrzas
and
M. Rubio-Diez
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2009
High resolution UVES/VLT spectra of white dwarfs observed for the ESO SN Ia Progenitor Survey III. DA white dwarfs. (2009)
D. Koester,
B. Voss,
R. Napiwotzki,
N. Christlieb,
D. Homeier,
T. Lisker,
D. Reimers
and
U. Heber
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Astronometry with the Hubble Space Telescope : trigonometric parallaxes of planetary nebula nuclei NGC 6853, NGC 7293, Abell 31 and DeHt 5. (2009)
G.F. Benedict,
B.E. McArthur,
R. Napiwotzki,
T.E. Harrison,
H.C. Harris,
E. Nelan,
H.E. Bond,
R.J. Patterson
and
R. Ciardullo
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Central stars of planetary nebulae in SDSS and IPHAS. (2009)
S. Weston,
R. Napiwotzki
and
S.E. Sale
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High spatial resolution Galactic 3D extinction mapping with IPHAS. (2009)
S.E. Sale,
J.E. Drew,
Y.C. Unruh,
M.J. Irwin,
C. Knigge,
S. Phillips,
A.A. Zijlstra,
B.T. Gansicke,
R. Greimel,
P. Groot,
A. Mampaso,
R.A.H. Morris,
R. Napiwotzki,
D. Steeghs
and
N.A. Walton
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High-resolution optical spectroscopy of Praesepe white dwarfs. (2009)
S.L. Casewell,
P.D. Dobbie,
R. Napiwotzki,
M.R. Burleigh,
M.A. Barstow
and
R.F. Jameson
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RAT J1953+1859: a dwarf nova discovered through high amplitude QPOs in quiescence. (2009)
G. Ramsay,
P. Hakala,
T. Barclay,
P.J. Wheatley,
G. Marshall,
H. Lehto,
R. Napiwotzki,
G. Nelemans,
S. Potter
and
I. Todd
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Subdwarf B and O stars : which evolutionary pathways? (2009)
R. Napiwotzki
The UV-excess survey of the northern galactic plane. (2009)
P. Groot,
K. Verbeek,
R. Greimel,
M.J. Irwin,
E. Gonzalez-Solares,
B.T. Gansicke,
E. De Groot,
J.E. Drew,
R. Napiwotzki,
S. Weston
and
Niall Deacon
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The age of white dwarf companions. (2009)
S. Weston
and
R. Napiwotzki
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The galactic population of white dwarfs. (2009)
R. Napiwotzki
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A new detailed examination of white dwarfs in NGC 3532 and NGC 2287. (2009)
P.D. Dobbie,
R. Napiwotzki,
M.R. Burleigh,
K.A. Williams,
R.G. Sharp,
M.A. Barstow,
S.L. Casewell
and
I. Hubeny
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A survey for post-common-envelope binary stars using GALEX and SDSS photometry. (2009)
P.F.L. Maxted,
B.T. Gansicke,
M.R. Burleigh,
J. Southworth,
T.R. Marsh,
R. Napiwotzki,
G. Nelemans
and
P.L. Wood
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2008
The B-type giant HD 271791 in the Galactic halo : Linking run-away stars to hyper-velocity stars. (2008)
U. Heber,
H. Edelmann,
R. Napiwotzki,
M. Altmann
and
R.D. Scholz
Binary sdB Stars with Massive Compact Companions. (2008)
S. Geier,
C. Karl,
H. Edelmann,
U. Heber
and
R. Napiwotzki
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Discovery of a widely separated ultracool dwarf–white dwarf binary. (2008)
A.C. Day-Jones,
D.J. Pinfield,
R. Napiwotzki,
B. Burningham,
J.S. Jenkins,
H.R.A. Jones,
S. Folkes,
D. Weights
and
J.R.A. Clarke
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Hypervelocity Stars: Young and Heavy or Old and Light? (2008)
U. Heber,
H. Hirsch,
H. Edelmann,
R. Napiwotzki,
S. O'Toole,
W. Brown
and
M. Altmann
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LMC origin of the hyper-velocity star HE 0437-5439: Beyond the supermassive black hole paradigm. (2008)
N. Przybilla,
M.A. Nieva,
U. Heber,
M. Firnstein,
K. Butler,
R. Napiwotzki
and
H. Edelmann
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Metal Abundances of Subdwarf B Stars from SPY - a Pattern Emerges. (2008)
S. Geier,
U. Heber
and
R. Napiwotzki
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Model Spectra of Hot Subdwarfs for the Gaia Mission. (2008)
Luke Hindson,
R. Napiwotzki,
U. Heber
and
M. Lemke
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The Origin of Helium-Rich Subdwarf O Stars. (2008)
R. Napiwotzki
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Radial Velocity Variable sdO/Bs from SPY - Preliminary Orbits of Three New Short Period Binaries. (2008)
S. Geier,
U. Heber
and
R. Napiwotzki
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Recycling Matter in the Universe. X-ray observations of SBS 1150+599A (PN G135.9+55.9). (2008)
G. Tovmassian,
J. Tomsick,
R. Napiwotzki,
L. Yungelson,
M. Pena,
G. Stasinska
and
M.G. Richer
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A planetary nebula around Nova V458 Vulpeculae undergoing flash ionization. (2008)
R. Wesson,
M.J. Barlow,
R.L.M. Corradi,
J.E. Drew,
P. Groot,
C. Knigge,
D. Steeghs,
B.T. Gaensicke,
R. Napiwotzki,
P. Rodriguez-Gil,
A.A. Zijlstra,
M.F. Bode,
J. Drake,
D.J. Frew,
E. Gonzalez-Solares,
R. Greimel,
M.J. Irwin,
L. Morales-Rueda,
G. Nelemans,
Q.A. Parker
and
S.E. Sale
2007
3D-Kinematics of White Dwarfs from the SPY-Project. (2007)
R. Richter,
U. Heber
and
R. Napiwotzki
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Binary White Dwarfs in the Supernova Ia Progenitor Survey. (2007)
R. Napiwotzki,
C. Karl,
G. Nelemans,
L. Yungelson,
N. Christlieb,
H. Drechsel,
U. Heber,
D. Homeier,
D. Koester,
B. Leibundgut,
T.R. Marsh,
S. Moehler,
A. Renzini
and
D. Reimers
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Discovery of the First Very Wide WD LD Binary System. (2007)
A.C. Day-Jones,
D.J. Pinfield,
H.R.A. Jones,
T.R. Kendall,
R. Napiwotzki
and
J.S. Jenkins
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Follow-up Observations of SPY White Dwarf + M-Dwarf Binaries. (2007)
P.F.L. Maxted,
R. Napiwotzki,
T.R. Marsh,
M.R. Burleigh,
P.D. Dobbie,
E. Hogan
and
G. Nelemans
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The Fraction of DA White Dwarfs with Kilo-Gauss Magnetic Fields. (2007)
S. Jordan,
R. Aznar Cuadrado,
R. Napiwotzki,
H.M. Schmid
and
S.K. Solanki
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The Origins of the Ultramassive White Dwarf GD50. (2007)
P.D. Dobbie,
R. Napiwotzki,
N. Lodieu,
M.R. Burleigh,
M.A. Barstow
and
R.F. Jameson
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Six New ZZ Ceti Stars from the SPY and the HQS Surveys. (2007)
B. Voss,
D. Koester,
R. Ostensen,
R. Napiwotzki,
D. Homeier
and
D. Reimers
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Spectroscopic Analysis of Subluminous B Stars in Binaries with Compact Companions. (2007)
S. Geier,
C. Karl,
H. Edelmann,
U. Heber
and
R. Napiwotzki
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The Subdwarf B + White Dwarf Binary KPD 1930+2752, a Supernova Type Ia Progenitor Candidate. (2007)
S. Geier,
S. Nesslinger,
U. Heber,
N. Przybilla,
R. Napiwotzki
and
R-P. Kudritzki
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Testing Magnetic Braking: The X-ray Activity of M Dwarfs in Pre-Cataclysmic Variable Systems. (2007)
K.R. Briggs,
R. Napiwotzki,
P.F.L. Maxted
and
P.J. Wheatley
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White Dwarfs in the European Galactic Plane Surveys (EGAPS). (2007)
L. Morales-Rueda,
P. Groot,
R. Napiwotzki
and
J.E. Drew
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A debris disk around the central star of the Helix Nebula? (2007)
K.Y.L. Su,
Y-H. Chu,
G. Rieke,
P.J. Huggins,
R. Gruendl,
R. Napiwotzki,
T. Rauch,
W.B. Latter
and
K. Volk
An object that defies stereotypes : X-ray observations of SBS 1150+599A - the binary nucleus of PN G135.9+55.9. (2007)
G. Tovmassian,
J. Tomsick,
R. Napiwotzki,
L. Yungelson,
G. Stasinska,
M. Pena
and
M.G. Richer
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2006
3D kinematics of white dwarfs from the SPY project. II. (2006)
E.M. Pauli,
R. Napiwotzki,
U. Heber,
M. Altmann
and
M. Odenkirchen
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Discovery of eleven new ZZ Ceti stars. (2006)
B.G. Castanheira,
S.O. Kepler,
F. Mullally,
D.E. Winget,
D. Koester,
B. Voss,
S.J. Kleinman,
A. Nitta,
D.J. Eisenstein,
R. Napiwotzki
and
D. Reimers
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Discovery of seven ZZ Ceti stars using a new photometric selection method. (2006)
B. Voss,
D. Koester,
R. Ostensen,
S.O. Kepler,
R. Napiwotzki,
D. Homeier
and
D. Reimers
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New Praesepe white dwarfs and the initial mass final mass relation. (2006)
P.D. Dobbie,
R. Napiwotzki,
M.R. Burleigh,
M.A. Barstow,
D.D. Boyce,
S.L. Casewell,
R.F. Jameson,
I. Hubeny
and
G. Fontaine
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On near Chandrasekhar mass central stars of planetary nebulae. (2006)
R. Napiwotzki
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On the origin of the ultramassive white dwarf GD 50. (2006)
P.D. Dobbie,
R. Napiwotzki,
N. Lodieu,
M.R. Burleigh,
M.A. Barstow
and
R.F. Jameson
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RApid Temporal Survey (RATS) II. Follow up observations of four newly discovered short-period variables. (2006)
G. Ramsay,
R. Napiwotzki,
P. Hakala
and
H. Lehto
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Survival of a brown dwarf after engulfment by a red giant star. (2006)
P.F.L. Maxted,
R. Napiwotzki,
P.D. Dobbie
and
M.R. Burleigh
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Time-resolved observations of the short period CV SDSS J123813.73-033933.0. (2006)
S.V. Zharikov,
G. Tovmassian,
R. Napiwotzki,
R. Michel
and
V. Neustroev
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A near-infrared spectroscopic detection of the brown dwarf in the post common envelope binary WD 0137-349. (2006)
M.R. Burleigh,
E. Hogan,
P.D. Dobbie,
R. Napiwotzki
and
P.F.L. Maxted
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2005
HS 0146 1847 - a DAZB white dwarf of very unusual composition. (2005)
D. Koester,
R. Napiwotzki,
B. Voss,
D. Homeier
and
D. Reimers
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Rotation velocities of white dwarfs. III. DA stars with convective atmospheres. (2005)
C. Karl,
R. Napiwotzki,
U. Heber,
S. Dreizler,
D. Koester
and
I.N. Reid
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Six detached white-dwarf close binaries. (2005)
L. Morales-Rueda,
P.F.L. Maxted,
G. Nelemans,
C. Karl,
R. Napiwotzki,
C. Moran
and
T.R. Marsh
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Metal traces in white dwarfs of the SPY (ESO Supernova Ia Progenitor Survey) sample. (2005)
D. Koester,
K. Rollenhagen,
R. Napiwotzki,
B. Voss,
N. Christlieb,
D. Homeier
and
D. Reimers
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Hot subdwarfs from the ESO Supernova Ia Progenitor Survey. I. Atmospheric parameters and cool companions of sdB stars. (2005)
T. Lisker,
U. Heber,
R. Napiwotzki,
N. Christlieb,
Z. Han,
D. Homeier
and
D. Reimers
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Binaries discovered by the SPY project IV. Five single-lined DA double white dwarfs. (2005)
G. Nelemans,
R. Napiwotzki,
C. Karl,
T.R. Marsh,
B. Voss,
G. Roelofs,
R.G. Izzard,
M. Montgomery,
T. Reerink,
N. Christlieb
and
D. Reimers
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DAZ White Dwarfs in the SPY Sample. (2005)
D. Koester,
K. Rollenhagen,
R. Napiwotzki,
B. Voss,
N. Christlieb,
D. Homeier
and
D. Reimers
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HE 0437-5439: an unbound hypervelocity main-sequence B-type star. (2005)
H. Edelmann,
R. Napiwotzki,
U. Heber,
N. Christlieb
and
D. Reimers
Identification of a DO White Dwarf and a PG1159 Star in the ESO SN Ia Progenitor Survey (SPY). (2005)
K. Werner,
T. Rauch,
R. Napiwotzki,
N. Christlieb,
D. Reimers
and
C. Karl
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Kilo-Gauss Magnetic Fields in Three DA White Dwarfs. (2005)
R. Aznar Cuadrado,
S. Jordan,
R. Napiwotzki,
H.M. Schmid,
S.K. Solanki
and
G. Mathys
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The Mass of the sdB Primary of the Binary HS 2333+3927. (2005)
U. Heber,
H. Drechsel,
C. Karl,
R. Ostensen,
S. Folkes,
R. Napiwotzki,
M. Altmann,
O. Cordes,
J.E. Solheim,
B. Voss
and
D. Koester
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A Model of the Local WD Population. (2005)
K.P. Schroder,
R. Napiwotzki
and
E.M. Pauli
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New Results from the Supernova Ia Progenitor Survey. (2005)
R. Napiwotzki,
C. Karl,
G. Nelemans,
L. Yungelson,
N. Christlieb,
H. Drechsel,
U. Heber,
D. Homeier,
D. Koester,
J. Kruk,
B. Leibundgut,
T.R. Marsh,
S. Moehler,
A. Renzini
and
D. Reimers
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Rotation Velocities of DA White Dwarfs with Convective Atmospheres. (2005)
C. Karl,
U. Heber,
R. Napiwotzki,
S. Dreizler,
D. Koester
and
I.N. Reid
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Rotation velocities of white dwarfs determined from the Ca II K line. (2005)
L. Berger,
D. Koester,
R. Napiwotzki,
I.N. Reid
and
B. Zuckerman
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Subdwarf B Binaries from the SPY Project. (2005)
C. Karl,
U. Heber
and
R. Napiwotzki
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Subdwarf B Stars from the ESO Supernova Ia Progenitor Survey -- Observation versus Theory. (2005)
T. Lisker,
U. Heber,
R. Napiwotzki,
N. Christlieb,
Z. Han,
D. Homeier
and
D. Reimers
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Subluminous O Stars from the ESO Supernova Progenitor Survey - Observation versus Theory. (2005)
A. Stroeer,
U. Heber,
T. Lisker,
R. Napiwotzki
and
S. Dreizler
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Time-resolved Observations of the Short Period CV SDSS J123813.73-033933.0. (2005)
S.V. Zharikov,
G. Tovmassian,
V. Neustroev,
R. Michel
and
R. Napiwotzki
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Two new ZZ Ceti pulsators from the HS and HE surveys. (2005)
R. Silvotti,
B. Voss,
I. Bruni,
D. Koester,
D. Reimers,
R. Napiwotzki
and
D. Homeier
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Wolf-Rayet and O star runaway populations from supernovae. (2005)
L.M. Dray,
J.E. Dale,
M.E. Beer,
R. Napiwotzki
and
A.R. King
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A near-IR spectrum of the DO white dwarf RE J0503-285. (2005)
P.D. Dobbie,
M.R. Burleigh,
A. Levan,
M.A. Barstow,
R. Napiwotzki
and
I. Hubeny
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A near-infrared spectroscopic search for very-low-mass cool companions to notable DA white dwarfs. (2005)
P.D. Dobbie,
M.R. Burleigh,
A. Levan,
M.A. Barstow,
R. Napiwotzki,
J.B. Holberg,
I. Hubeny
and
S.B. Howell
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A study of two post-common envelope binary systems. (2005)
K.M. Exter,
D.L. Pollacco,
P.F.L. Maxted,
R. Napiwotzki
and
S.A. Bell
2004
A Close Binary Nucleus in the MOST Oxygen-Poor Planetary Nebula PN G135.9 55.9. (2004)
G. Tovmassian,
R. Napiwotzki,
M.G. Richer,
G. Stasinska,
A.W. Fullerton
and
T. Rauch
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Identification of neon in FUSE and VLT spectra of extremely hot hydrogen-deficient (pre-) white dwarfs. (2004)
K. Werner,
T. Rauch,
E. Reiff,
J. Kruk
and
R. Napiwotzki
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Identification of a DO white dwarf and a PG 1159 star in the ESO SN Ia progenitor survey (SPY). (2004)
K. Werner,
T. Rauch,
R. Napiwotzki,
N. Christlieb,
D. Reimers
and
C. Karl
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Close binary EHB stars from SPY. (2004)
R. Napiwotzki,
C. Karl,
T. Lisker,
U. Heber,
N. Christlieb,
D. Reimers,
G. Nelemans
and
D. Homeier
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HS 2333 3927: A new sdB dM binary with a large reflection effect. (2004)
U. Heber,
H. Drechsel,
R. Ostensen,
C. Karl,
R. Napiwotzki,
M. Altmann,
O. Cordes,
J.E. Solheim,
B. Voss,
D. Koester
and
S. Folkes
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Discovery of kilogauss magnetic fields in three DA white dwarfs. (2004)
R. Aznar Cuadrado,
S. Jordan,
R. Napiwotzki,
H.M. Schmid,
S.K. Solanki
and
G. Mathys
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Double Degenerate and Progenitors of Supernovae Type Ia. (2004)
R. Napiwotzki,
L. Yungelson,
G. Nelemans,
T.R. Marsh,
B. Leibundgut,
A. Renzini,
D. Homeier,
D. Koester,
S. Moehler,
N. Christlieb,
D. Reimers,
H. Drechsel,
U. Heber,
C. Karl
and
E.M. Pauli
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FUSE Observations of EC14026 Stars. (2004)
P. Chayer,
G. Fontaine,
M. Fontaine,
R. Lamontagne,
F. Wesemael,
J. Dupuis,
U. Heber,
R. Napiwotzki
and
S. Moehler
HS 2333 + 3927: a new sdB binary with a large reflection effect. (2004)
C. Karl,
U. Heber,
H. Drechsel,
R. Napiwotzki,
M. Altmann,
R. Ostensen,
S. Folkes,
J.E. Solheim,
O. Cordes,
B. Voss
and
D. Koester
Praesepe and the seven white dwarfs. (2004)
P.D. Dobbie,
D.J. Pinfield,
R. Napiwotzki,
N.C. Hambly,
M.R. Burleigh,
M.A. Barstow,
R.F. Jameson
and
I. Hubeny
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Spectral types and masses of white dwarfs in globular clusters. (2004)
S. Moehler,
D. Koester,
M. Zoccali,
F.R. Ferraro,
U. Heber,
R. Napiwotzki
and
A. Renzini
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Spectroscopic analysis of sdB stars from the ESO Supernova Ia Progenitor Survey. (2004)
T. Lisker,
U. Heber,
R. Napiwotzki,
N. Christlieb,
Z. Han,
D. Homeier
and
D. Reimers
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A population model of the solar neighbourhood thin disc white dwarfs. (2004)
K.P. Schroder,
E.M. Pauli
and
R. Napiwotzki
2003
Discovery of a helium-core white dwarf progenitor. (2003)
U. Heber,
H. Edelmann,
T. Lisker
and
R. Napiwotzki
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2MASS J0516288+260738: Discovery of the first eclipsing late K + Brown dwarf binary system. (2003)
S.L. Schuh,
G. Handler,
H. Drechsel,
P. Hauschildt,
S. Dreizler,
R. Medupe,
C. Karl,
R. Napiwotzki,
S. Kim,
B.G. Park,
M. Wood,
M. Paparo,
B. Szeidl,
G. Viraghalmy,
D. Zsuffa,
O. Hashimoto,
K. Kinugasa,
H. Taguchi,
E. Kambe,
E. Leibowitz,
P. Ibbetson,
Y. Lipkin,
T. Nagel,
E. Gohler
and
M.L. Pretorius
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Binaries discovered by the SPY project. III. HE 2209-1444: A massive, short period double degenerate. (2003)
C. Karl,
R. Napiwotzki,
G. Nelemans,
N. Christlieb,
D. Koester,
U. Heber
and
D. Reimers
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Heavy-element abundance patterns in hot DA white dwarfs. (2003)
M.A. Barstow,
S.A. Good,
J.B. Holberg,
I. Hubeny,
N.P. Bannister,
F.C. Bruhweiler,
M.R. Burleigh
and
R. Napiwotzki
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3D kinematics of white dwarfs from the SPY project. (2003)
E.M. Pauli,
R. Napiwotzki,
M. Altmann,
U. Heber,
M. Odenkirchen
and
F. Kerber
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Spectral analysis of sdB Stars from the Hamburg Quasar Survey. (2003)
H. Edelmann,
U. Heber,
H.J. Hagen,
S. Dreizler,
R. Napiwotzki,
D. Engels
and
M. Lemke
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NLTE Spectral Analysis of Iron Group Elements in the Hot Subluminous O-star BD+28 4211. (2003)
M. Ramspeck,
S. Haas,
R. Napiwotzki,
U. Heber,
J. Deetjen
and
S. Dreizler
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SPY - the ESO Supernovae type Ia Progenitor survey. (2003)
R. Napiwotzki,
N. Christlieb,
H. Drechsel,
H.J. Hagen,
U. Heber,
D. Homeier,
C. Karl,
D. Koester,
B. Leibundgut,
T.R. Marsh,
S. Moehler,
G. Nelemans,
E.M. Pauli,
D. Reimers,
A. Renzini
and
L. Yungelson
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2002
Binaries discovered by the SPY project. II. HE 1414-0848: A double degenerate with a mass close to the Chandrasekhar limit. (2002)
R. Napiwotzki,
D. Koester,
G. Nelemans,
L. Yungelson,
N. Christlieb,
A. Renzini,
D. Reimers,
H. Drechsel
and
B. Leibundgut
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Resolving subdwarf B stars in binaries by HST imaging. (2002)
U. Heber,
S. Moehler,
R. Napiwotzki,
P. Thejll
and
E. Green
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Extremely faint blue-tail stars in ω Centauri. (2002)
S. Moehler,
R. Napiwotzki,
A.V. Sweigart,
S. Landsman
and
S. Dreizler
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FUSE observations of PG1342+444 : new insights into the nature of the hottest DA white dwarfs. (2002)
M.A. Barstow,
S.A. Good,
J.B. Holberg,
M.R. Burleigh,
N.P. Bannister,
I. Hubeny
and
R. Napiwotzki
2001
HS 0705 6700: A new eclipsing sdB binary. (2001)
H. Drechsel,
U. Heber,
R. Napiwotzki,
R. Ostensen,
J.E. Solheim,
F. Johannessen,
S.L. Schuh,
J. Deetjen
and
S. Zola
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High-resolution UVES/VLT spectra of white dwarfs observed for the ESO SN Ia progenitor survey (SPY). I. (2001)
D. Koester,
R. Napiwotzki,
N. Christlieb,
H. Drechsel,
H.J. Hagen,
U. Heber,
D. Homeier,
C. Karl,
B. Leibundgut,
S. Moehler,
G. Nelemans,
D. Reimers,
E.M. Pauli,
A. Renzini
and
L. Yungelson
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Binaries discovered by the SPY project. I. HE 1047-0436: A subdwarf B white dwarf syste. (2001)
R. Napiwotzki,
H. Edelmann,
U. Heber,
C. Karl,
H. Drechsel,
E.M. Pauli
and
N. Christlieb
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UITBOC 1574: A Very Distant Helium- poor Subdwarf O Star. (2001)
M. Seibert,
P. Chayer,
G.R. Meurer,
R. Saffer
and
R. Napiwotzki
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Spectroscopic investigation of old planetaries- V. Distance scales. (2001)
R. Napiwotzki
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Far-ultraviolet spectroscopy of the hot DA white dwarf WD 2218 706 (DeHt5) with STIS. (2001)
M.A. Barstow,
N.P. Bannister,
J.B. Holberg,
I. Hubeny,
F.C. Bruhweiler
and
R. Napiwotzki
Heavy Elements in DA White Dwarfs. (2001)
M.A. Barstow,
M.R. Burleigh,
N.P. Bannister,
J.B. Holberg,
I. Hubeny,
F.C. Bruhweiler
and
R. Napiwotzki
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Metal abundances of sdB stars. (2001)
H. Edelmann,
U. Heber
and
R. Napiwotzki
Search for progenitors of supernovae type Ia with SPY. (2001)
R. Napiwotzki,
N. Christlieb,
H. Drechsel,
H.J. Hagen,
U. Heber,
D. Homeier,
C. Karl,
D. Koester,
B. Leibundgut,
T.R. Marsh,
S. Moehler,
G. Nelemans,
E.M. Pauli,
D. Reimers,
A. Renzini
and
L. Yungelson
Spectral Monitoring of HS 0209+0832 a DAB White Dwarf in the DB Gap. (2001)
H. Edelmann,
U. Heber
and
R. Napiwotzki
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Spectral analysis of sdB Stars from the Hamburg ESO Survey. (2001)
H. Edelmann,
U. Heber,
R. Napiwotzki,
M. Lemke
and
N. Christlieb
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1999
A Comparative Study of the Mass Distribution of Extreme-Ultraviolet selected White Dwarfs. (1999)
R. Napiwotzki,
P.J. Green
and
R. Saffer
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How accurately do we know the parameters of hot DA white dwarfs. (1999)
R. Napiwotzki,
P.J. Green
and
R. Saffer
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Masses and Other Parameters of the PostCommon Envelope Binary BE Ursae Majoris. (1999)
D.H. Ferguson,
J. Liebert,
S. Haas,
R. Napiwotzki
and
T.A. James
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Optical spectroscopy of the candidate luminous white dwarf in the young Large Magellanic Cloud cluster NGC 1818. (1999)
M.R. Burleigh,
R. Saffer,
G.F. Gilmore
and
R. Napiwotzki
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Spectral analysis of hot subluminous stars. (1999)
U. Heber,
H. Edelmann,
M. Lemke,
R. Napiwotzki
and
D. Engels
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Spectral analysis of the binary sdB star Feige 36. (1999)
H. Edelmann,
U. Heber,
R. Napiwotzki,
I.N. Reid
and
R. Saffer
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Spectroscopic investigation of old planetaries. IV. Model atmosphere analysis. (1999)
R. Napiwotzki
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