Fulltext

Galaxy And Mass Assembly (GAMA): galaxy environments and star formation rate variations

Wijesinghe, D. B. ; Hopkins, A. M. ; Brough, S. ; Taylor, E. N. ; Norberg, P. ; Bauer, A. ; Brown, M. J. I. ; Cameron, E. ; Conselice, C. J. ; Croom, S. ; Driver, S. ; Grootes, M. W. ; Jones, D. H. ; Kelvin, L. ; Loveday, J. ; Pimbblet, K. A. ; Popescu, C. C. ; Prescott, M. ; Sharp, R. ; Baldry, I. ; Sadler, E. M. ; Liske, J. ; Robotham, A. S. G. ; Bamford, S. ; Bland-Hawthorn, J. ; Gunawardhana, M. ; Meyer, M. ; Parkinson, H. ; Drinkwater, M. J. ; Peacock, J. ; Tuffs, R.

In: Monthly Notices of the Royal Astronomical Society, 2012, vol. 423, no. 4, p. 3679-3691

Ajouter à la liste personnelle
    Titre
    • Galaxy And Mass Assembly (GAMA): galaxy environments and star formation rate variations
    Auteur
    • Wijesinghe, D. B.. Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
    • Hopkins, A. M.. Australian Astronomical Observatory, PO Box 296, Epping, NSW 1710, Australia
    • Brough, S.. Australian Astronomical Observatory, PO Box 296, Epping, NSW 1710, Australia
    • Taylor, E. N.. Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
    • Norberg, P.. Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ
    • Bauer, A.. Australian Astronomical Observatory, PO Box 296, Epping, NSW 1710, Australia
    • Brown, M. J. I.. School of Physics, Monash University, Clayton, Victoria 3800, Australia
    • Cameron, E.. ETH Zurich, Institute for Astronomy, HIT J12.3, CH-8093 Zurich, Switzerland
    • Conselice, C. J.. School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD
    • Croom, S.. Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
    • Driver, S.. International Centre for Radio Astronomy Research (ICRAR), University of Western Australia, Crawley, WA 6009, Australia
    • Grootes, M. W.. Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
    • Jones, D. H.. School of Physics, Monash University, Clayton, Victoria 3800, Australia
    • Kelvin, L.. International Centre for Radio Astronomy Research (ICRAR), University of Western Australia, Crawley, WA 6009, Australia
    • Loveday, J.. Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QH
    • Pimbblet, K. A.. School of Physics, Monash University, Clayton, Victoria 3800, Australia
    • Popescu, C. C.. Jeremiah Horrocks Institute for Astrophysics and Supercomputing, University of Central Lancashire, Preston PR1 2HE
    • Prescott, M.. Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD
    • Sharp, R.. Research School of Astronomy and Astrophysics, the Australian National University, Cotter Road, Weston Creek, ACT 2611, Australia
    • Baldry, I.. Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD
    • Sadler, E. M.. Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
    • Liske, J.. European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching, Germany
    • Robotham, A. S. G.. International Centre for Radio Astronomy Research (ICRAR), University of Western Australia, Crawley, WA 6009, Australia
    • Bamford, S.. School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD
    • Bland-Hawthorn, J.. School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD
    • Gunawardhana, M.. Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
    • Meyer, M.. International Centre for Radio Astronomy Research (ICRAR), University of Western Australia, Crawley, WA 6009, Australia
    • Parkinson, H.. Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ
    • Drinkwater, M. J.. Department of Physics, University of Queensland, QLD 4072, Australia
    • Peacock, J.. Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ
    • Tuffs, R.. Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Monthly Notices of the Royal Astronomical Society, 2012, vol. 423, no. 4, p. 3679-3691. Blackwell Publishing Ltd
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:297136
    Summary
    We present a detailed investigation into the effects of galaxy environment on their star formation rates (SFRs) using galaxies observed in the Galaxy And Mass Assembly (GAMA) survey. We use three independent volume-limited samples of galaxies within z < 0.2 and Mr < −17.8. We investigate the known SFR-density relationship and explore in detail the dependence of SFR on stellar mass and density. We show that the SFR-density trend is only visible when we include the passive galaxy population along with the star-forming population. This SFR-density relation is absent when we consider only the star-forming population of galaxies, consistent with previous work. While there is a strong dependence of the EWHα on density we find, as in previous studies, that these trends are largely due to the passive galaxy population and this relationship is absent when considering a ‘star-forming' sample of galaxies. We find that stellar mass has the strongest influence on SFR and EWHα with the environment having no significant effect on the star formation properties of the star-forming population. We also show that the SFR-density relationship is absent for both early- and late-type star-forming galaxies. We conclude that the stellar mass has the largest impact on the current SFR of a galaxy, and any environmental effect is not detectable. The observation that the trends with density are due to the changing morphology fraction with density implies that the time-scales must be very short for any quenching of the SFR in infalling galaxies. Alternatively, galaxies may in fact undergo predominantly in situ evolution where the infall and quenching of galaxies from the field into dense environments is not the dominant evolutionary mode