The latitude distribution of star-spots on He 699
In this paper, the latitude distribution of star-spots is analysed for the rapidly rotating G dwarf He 699, An image has been reconstructed from data taken with the William Herschel Telescope on La Palma on 2000 October 8. The predominant magnetic field structure is a decentred polar spot at high latitude, with smaller low-latitude features also present. This result is verified by independent reconstructions using even- and odd-numbered spectra. This work confirms and extends that of Barnes et al.. and provides further evidence that there is a correlation between the presence of low-latitude features and the amplitude of the photometric light curve. It is also a further step in the search for activity cycles on young G dwarfs.
Item Type | Article |
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Keywords | methods : data analysis; stars : activity; stars : imaging; stars : individual : He 699; stars : late-type; stars : spots; ALPHA-PERSEI CLUSTER; LOW-MASS STARS; ROTATIONAL VELOCITIES; MAIN-SEQUENCE; G-DWARFS; EVOLUTION; ALGORITHM; PLEIADES; IMAGES |
Date Deposited | 29 May 2025 09:01 |
Last Modified | 29 May 2025 09:01 |