The 2dF Galaxy Redshift Survey: the luminosity function of cluster galaxies
Corresponding Author
Roberto De Propris
Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia
Department of Astrophysics and Optics, University of New South Wales, Sydney, NSW 2052, Australia
E-mail: [email protected]Search for more papers by this authorMatthew Colless
Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia
Search for more papers by this authorSimon P. Driver
Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia
Search for more papers by this authorWarrick Couch
Department of Astrophysics and Optics, University of New South Wales, Sydney, NSW 2052, Australia
Search for more papers by this authorJohn A. Peacock
Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ
Search for more papers by this authorIvan K. Baldry
Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street Baltimore, MD 21218, USA
Search for more papers by this authorCarlton M. Baugh
Department of Physics, University of Durham, Science Laboratories, South Road, Durham DH1 3LE
Search for more papers by this authorJoss Bland-Hawthorn
Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
Search for more papers by this authorTerry Bridges
Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
Search for more papers by this authorRussell Cannon
Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
Search for more papers by this authorShaun Cole
Department of Physics, University of Durham, Science Laboratories, South Road, Durham DH1 3LE
Search for more papers by this authorChris Collins
Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead, L14 1LD
Search for more papers by this authorNicholas Cross
Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street Baltimore, MD 21218, USA
Search for more papers by this authorGavin B. Dalton
Department of Physics, Keble Road, Oxford OX1 3RH
Search for more papers by this authorGeorge Efstathiou
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA
Search for more papers by this authorRichard S. Ellis
Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA
Search for more papers by this authorCarlos S. Frenk
Department of Physics, University of Durham, Science Laboratories, South Road, Durham DH1 3LE
Search for more papers by this authorKarl Glazebrook
Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street Baltimore, MD 21218, USA
Search for more papers by this authorEdward Hawkins
School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD
Search for more papers by this authorCarole Jackson
Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia
Search for more papers by this authorStuart Lumsden
Department of Physics and Astronomy, E C Stoner Building, Leeds LS2 9JT
Search for more papers by this authorSteve Maddox
School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD
Search for more papers by this authorDarren S. Madgwick
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA
Search for more papers by this authorPeder Norberg
Department of Physics, University of Durham, Science Laboratories, South Road, Durham DH1 3LE
Search for more papers by this authorWill Percival
Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ
Search for more papers by this authorBruce Peterson
Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia
Search for more papers by this authorWill Sutherland
Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
Search for more papers by this authorKeith Taylor
Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA
Search for more papers by this authorCorresponding Author
Roberto De Propris
Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia
Department of Astrophysics and Optics, University of New South Wales, Sydney, NSW 2052, Australia
E-mail: [email protected]Search for more papers by this authorMatthew Colless
Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia
Search for more papers by this authorSimon P. Driver
Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia
Search for more papers by this authorWarrick Couch
Department of Astrophysics and Optics, University of New South Wales, Sydney, NSW 2052, Australia
Search for more papers by this authorJohn A. Peacock
Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ
Search for more papers by this authorIvan K. Baldry
Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street Baltimore, MD 21218, USA
Search for more papers by this authorCarlton M. Baugh
Department of Physics, University of Durham, Science Laboratories, South Road, Durham DH1 3LE
Search for more papers by this authorJoss Bland-Hawthorn
Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
Search for more papers by this authorTerry Bridges
Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
Search for more papers by this authorRussell Cannon
Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
Search for more papers by this authorShaun Cole
Department of Physics, University of Durham, Science Laboratories, South Road, Durham DH1 3LE
Search for more papers by this authorChris Collins
Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead, L14 1LD
Search for more papers by this authorNicholas Cross
Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street Baltimore, MD 21218, USA
Search for more papers by this authorGavin B. Dalton
Department of Physics, Keble Road, Oxford OX1 3RH
Search for more papers by this authorGeorge Efstathiou
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA
Search for more papers by this authorRichard S. Ellis
Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA
Search for more papers by this authorCarlos S. Frenk
Department of Physics, University of Durham, Science Laboratories, South Road, Durham DH1 3LE
Search for more papers by this authorKarl Glazebrook
Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street Baltimore, MD 21218, USA
Search for more papers by this authorEdward Hawkins
School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD
Search for more papers by this authorCarole Jackson
Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia
Search for more papers by this authorStuart Lumsden
Department of Physics and Astronomy, E C Stoner Building, Leeds LS2 9JT
Search for more papers by this authorSteve Maddox
School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD
Search for more papers by this authorDarren S. Madgwick
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA
Search for more papers by this authorPeder Norberg
Department of Physics, University of Durham, Science Laboratories, South Road, Durham DH1 3LE
Search for more papers by this authorWill Percival
Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ
Search for more papers by this authorBruce Peterson
Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia
Search for more papers by this authorWill Sutherland
Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
Search for more papers by this authorKeith Taylor
Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA
Search for more papers by this authorABSTRACT
We have determined the composite luminosity function (LF) for galaxies in 60 clusters from the 2dF Galaxy Redshift Survey. The LF spans the range −22.5 < M
< −15, and is well fitted by a Schechter function with M*
=−20.07 ± 0.07 and α=−1.28 ± 0.03 (H0= 100 km s−1 Mpc−1, ΩM= 0.3, ΩΛ= 0.7). It differs significantly from the field LF, having a characteristic magnitude that is approximately 0.3 mag brighter and a faint-end slope that is approximately 0.1 steeper. There is no evidence for variations in the LF across a wide range of cluster properties: the LF is similar for clusters with high and low velocity dispersions, for rich and poor clusters, for clusters with different Bautz–Morgan types, and for clusters with and without substructure. The core regions of clusters differ from the outer parts, however, in having an excess of very bright galaxies. We also construct the LFs for early (quiescent), intermediate and late (star-forming) spectral types. We find that, as in the field, the LFs of earlier-type galaxies have brighter characteristic magnitudes and shallower faint-end slopes. However, the LF of early-type galaxies in clusters is both brighter and steeper than its field counterpart, although the LF of late-type galaxies is very similar. The trend of faint-end slope with spectral type is therefore much less pronounced in clusters than in the field, explaining why variations in the mixture of types do not lead to significant differences in the cluster LFs. The differences between the field and cluster LFs for the various spectral types can be qualitatively explained by the suppression of star formation in the dense cluster environment, together with mergers to produce the brightest early-type galaxies.
Supporting Information
Data points for all LFs are made available in electronic form here as a Text (.txt) file
Please note: Wiley-Blackwell are not responsible for the content or functionality of any supporting materials supplied by the authors. Any queries (other than missing material) should be directed to the corresponding author for the article.
| Filename | Description |
|---|---|
| MNR_6510_sm_tu1.txt9.6 KB | Supporting info item |
Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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