The environment and characteristics of low-redshift galaxies detected by the Herschel-ATLAS

Dariush, A., Cortese, L., Eales, S., Pascale, E., Smith, M. W. L., Dunne, L., Dye, S., Scott, D., Auld, R., Baes, M., Bland-Hawthorn, J., Buttiglione, S., Cava, A., Clements, D. L., Cooray, A., Dezotti, G., Driver, S., Fritz, J., Gomez, H.L., Hopkins, A., Hopwood, R., Ivison, R.J., Jarvis, M.J., Jones, D. H., Kelvin, L., Khosroshahi, H. G., Liske, J., Loveday, J., Maddox, S., Madore, B. F., Michalowski, M. J., Norberg, P., Phillipps, S., Pohlen, M., Popescu, C. C., Prescott, M., Rigby, E., Robotham, A., Rodighiero, G., Seibert, M., Smith, Daniel, Temi, P., Tuffs, R. J. and van der Werf, P. (2011) The environment and characteristics of low-redshift galaxies detected by the Herschel-ATLAS. Monthly Notices of the Royal Astronomical Society (MNRAS), 418 (1). pp. 64-73. ISSN 0035-8711

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We investigate the ultraviolet and optical properties and environment of low-redshift galaxies detected in the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) science demonstration data. We use the Sloan Digital Sky Survey seventh release and the Galaxy and Mass Assembly data base to select galaxies with mag in the redshift range 0.02=z=0.2 and look for their submillimetre counterparts in H-ATLAS. Our results show that at low redshift, H-ATLAS detects mainly blue/star-forming galaxies with a minor contribution from red systems which are highly obscured by dust. In addition we find that the colour of a galaxy rather than the local density of its environment determines whether it is detectable by H-ATLAS. The average dust temperature of galaxies that are simultaneously detected by both PACS and SPIRE is 25 +/- 4K, independent of environment. This analysis provides a glimpse of the potential of the H-ATLAS data to investigate the submillimetre properties of galaxies in the local universe.

Item Type	Article
Keywords	methods: data analysis, galaxies: general, galaxies: statistics, submillimetre: galaxies, submillimetre: general
Date Deposited	15 May 2025 12:18
Last Modified	04 Jun 2025 16:59