The Ultraviolet Luminosity Function of GALEX Galaxies at Photometric Redshifts between 0.07 and 0.25
We present measurements of the UV galaxy luminosity function and the evolution of luminosity density from GALEX observations matched to the Sloan Digital Sky Survey (SDSS). We analyze galaxies in the Medium Imaging Survey overlapping the SDSS DR1 with a total coverage of 44 deg^2. Using the combined...
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| Veröffentlicht in: | Astrophysical journal. Letters 2005-01, Vol.619 (1), p.L31-L34 |
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| creator | Budavári, Tamás Szalay, Alex S Charlot, Stéphane Seibert, Mark Wyder, Ted K Arnouts, Stéphane Barlow, Tom A Bianchi, Luciana Byun, Yong-Ik Donas, José Forster, Karl Friedman, Peter G Heckman, Timothy M Jelinsky, Patrick N Lee, Young-Wook Madore, Barry F Malina, Roger F Martin, D. Christopher Milliard, Bruno Morrissey, Patrick Neff, Susan G Rich, R. Michael Schiminovich, David Siegmund, Oswald H. W Small, Todd Treyer, Marie A Welsh, Barry |
| description | We present measurements of the UV galaxy luminosity function and the evolution of luminosity density from GALEX observations matched to the Sloan Digital Sky Survey (SDSS). We analyze galaxies in the Medium Imaging Survey overlapping the SDSS DR1 with a total coverage of 44 deg^2. Using the combined GALEX+SDSS photometry, we compute photometric redshifts and study the LF in three redshift shells between z=0.07 and 0.25. The Schechter function fits indicate that the faint-end slope alpha is consistent with -1.1 at all redshifts but the characteristic UV luminosity M* brightens by 0.2 mag from z=0.07 to 0.25. In the lowest redshift bin, early and late type galaxies are studied separately and we confirm that red galaxies tend to be brighter and have a shallower slope alpha than blue ones. The derived luminosity densities are consistent with other GALEX results based on a local spectroscopic sample from 2dF and the evolution follows the trend reported by deeper studies. |
| doi_str_mv | 10.1086/423319 |
| format | Article |
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Christopher ; Milliard, Bruno ; Morrissey, Patrick ; Neff, Susan G ; Rich, R. Michael ; Schiminovich, David ; Siegmund, Oswald H. W ; Small, Todd ; Treyer, Marie A ; Welsh, Barry</creator><creatorcontrib>Budavári, Tamás ; Szalay, Alex S ; Charlot, Stéphane ; Seibert, Mark ; Wyder, Ted K ; Arnouts, Stéphane ; Barlow, Tom A ; Bianchi, Luciana ; Byun, Yong-Ik ; Donas, José ; Forster, Karl ; Friedman, Peter G ; Heckman, Timothy M ; Jelinsky, Patrick N ; Lee, Young-Wook ; Madore, Barry F ; Malina, Roger F ; Martin, D. Christopher ; Milliard, Bruno ; Morrissey, Patrick ; Neff, Susan G ; Rich, R. Michael ; Schiminovich, David ; Siegmund, Oswald H. W ; Small, Todd ; Treyer, Marie A ; Welsh, Barry</creatorcontrib><description>We present measurements of the UV galaxy luminosity function and the evolution of luminosity density from GALEX observations matched to the Sloan Digital Sky Survey (SDSS). We analyze galaxies in the Medium Imaging Survey overlapping the SDSS DR1 with a total coverage of 44 deg^2. Using the combined GALEX+SDSS photometry, we compute photometric redshifts and study the LF in three redshift shells between z=0.07 and 0.25. The Schechter function fits indicate that the faint-end slope alpha is consistent with -1.1 at all redshifts but the characteristic UV luminosity M* brightens by 0.2 mag from z=0.07 to 0.25. In the lowest redshift bin, early and late type galaxies are studied separately and we confirm that red galaxies tend to be brighter and have a shallower slope alpha than blue ones. 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W</au><au>Small, Todd</au><au>Treyer, Marie A</au><au>Welsh, Barry</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Ultraviolet Luminosity Function of GALEX Galaxies at Photometric Redshifts between 0.07 and 0.25</atitle><jtitle>Astrophysical journal. Letters</jtitle><date>2005-01-20</date><risdate>2005</risdate><volume>619</volume><issue>1</issue><spage>L31</spage><epage>L34</epage><pages>L31-L34</pages><issn>1538-4357</issn><issn>0004-637X</issn><issn>2041-8205</issn><eissn>1538-4357</eissn><eissn>2041-8213</eissn><coden>ASJOAB</coden><abstract>We present measurements of the UV galaxy luminosity function and the evolution of luminosity density from GALEX observations matched to the Sloan Digital Sky Survey (SDSS). We analyze galaxies in the Medium Imaging Survey overlapping the SDSS DR1 with a total coverage of 44 deg^2. Using the combined GALEX+SDSS photometry, we compute photometric redshifts and study the LF in three redshift shells between z=0.07 and 0.25. The Schechter function fits indicate that the faint-end slope alpha is consistent with -1.1 at all redshifts but the characteristic UV luminosity M* brightens by 0.2 mag from z=0.07 to 0.25. In the lowest redshift bin, early and late type galaxies are studied separately and we confirm that red galaxies tend to be brighter and have a shallower slope alpha than blue ones. The derived luminosity densities are consistent with other GALEX results based on a local spectroscopic sample from 2dF and the evolution follows the trend reported by deeper studies.</abstract><cop>Chicago, IL</cop><pub>IOP Publishing</pub><doi>10.1086/423319</doi><orcidid>https://orcid.org/0000-0003-3458-2275</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Astronomy Astrophysics Characteristics and properties of external galaxies and extragalactic objects Cosmology and Extra-Galactic Astrophysics Earth, ocean, space Exact sciences and technology Physics Statistical and correlative studies of properties (luminosity and mass functions mass-to-light ratio tully-fisher relation, etc.) Stellar systems. Galactic and extragalactic objects and systems. The universe |
| title | The Ultraviolet Luminosity Function of GALEX Galaxies at Photometric Redshifts between 0.07 and 0.25 |
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