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Title:
The Luminosity Function of Galaxies in SDSS Commissioning Data
Authors:
Blanton, Michael R.; Dalcanton, Julianne; Eisenstein, Daniel; Loveday, Jon; Strauss, Michael A.; SubbaRao, Mark; Weinberg, David H.; Anderson, John E., Jr.; Annis, James; Bahcall, Neta A.; Bernardi, Mariangela; Brinkmann, J.; Brunner, Robert J.; Burles, Scott; Carey, Larry; Castander, Francisco J.; Connolly, Andrew J.; Csabai, István; Doi, Mamoru; Finkbeiner, Douglas; Friedman, Scott; Frieman, Joshua A.; Fukugita, Masataka; Gunn, James E.; Hennessy, G. S.; Hindsley, Robert B.; Hogg, David W.; Ichikawa, Takashi; Ivezić, Željko; Kent, Stephen; Knapp, G. R.; Lamb, D. Q.; Leger, R. French; Long, Daniel C.; Lupton, Robert H.; McKay, Timothy A.; Meiksin, Avery; Merelli, Aronne; Munn, Jeffrey A.; Narayanan, Vijay; Newcomb, Matt; Nichol, R. C.; Okamura, Sadanori; Owen, Russell; Pier, Jeffrey R.; Pope, Adrian; Postman, Marc; Quinn, Thomas; Rockosi, Constance M.; Schlegel, David J.; Schneider, Donald P.; Shimasaku, Kazuhiro; Siegmund, Walter A.; Smee, Stephen; Snir, Yehuda; Stoughton, Chris; Stubbs, Christopher; Szalay, Alexander S.; Szokoly, Gyula P.; Thakar, Aniruddha R.; Tremonti, Christy; Tucker, Douglas L.; Uomoto, Alan; Vanden Berk, Dan; Vogeley, Michael S.; Waddell, Patrick; Yanny, Brian; Yasuda, Naoki; York, Donald G.
Affiliation:
AA(; Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510.), AB(; Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195.), AC(; Astronomy and Astrophysics Center, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637.; Hubble Fellow.), AD(; Sussex Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QJ, England, UK.), AE(; Princeton University Observatory, Princeton, NJ 08544.), AF(; Astronomy and Astrophysics Center, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637.), AG(; Department of Astronomy, Ohio State University, Columbus, OH 43210.), AH(; Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510.), AI(; Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510.), AJ(; Princeton University Observatory, Princeton, NJ 08544.), AK(; Astronomy and Astrophysics Center, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637.), AL(; Apache Point Observatory, 2001 Apache Point Road, P.O. Box 59, Sunspot, NM 88349-0059.), AM(; Department of Astronomy, California Institute of Technology, Pasadena, CA 91125.), AN(; Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510.), AO(; Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195.), AP(; Astronomy and Astrophysics Center, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637.; Observatoire Midi-Pyrénées, 14 avenue Edouard Belin, F-31400 Toulouse, France.), AQ(; Department of Physics and Astronomy, University of Pittsburgh, 3941 O'Hara Street, Pittsburgh, PA 15260.), AR(; Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218.), AS(; Department of Astronomy and Research Center for the Early Universe, School of Science, University of Tokyo, Tokyo 113-0033, Japan.), AT(; Department of Astronomy, 601 Campbell Hall, University of California, Berkeley, Berkeley, CA 94720-3411.), AU(; Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218.), AV(; Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510.), AW(; Institute for Cosmic-Ray Research, University of Tokyo, Midori, Tanashi, Tokyo 188-8502, Japan.; Institute for Advanced Study, Olden Lane, Princeton, NJ 08540.), AX(; Princeton University Observatory, Princeton, NJ 08544.), AY(; US Naval Observatory, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420.), AZ(; US Naval Observatory, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420.), BA(; Princeton University Observatory, Princeton, NJ 08544.), BB(; Department of Astronomy and Research Center for the Early Universe, School of Science, University of Tokyo, Tokyo 113-0033, Japan.), BC(; Princeton University Observatory, Princeton, NJ 08544.), BD(; Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510.), BE(; Princeton University Observatory, Princeton, NJ 08544.), BF(; Astronomy and Astrophysics Center, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637.), BG(; Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195.), BH(; Apache Point Observatory, 2001 Apache Point Road, P.O. Box 59, Sunspot, NM 88349-0059.), BI(; Princeton University Observatory, Princeton, NJ 08544.), BJ(; Department of Physics, University of Michigan, 500 East University, Ann Arbor, MI 48109.), BK(; Department of Physics and Astronomy, James Clerk Maxwell Building, The King's Buildings, University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, Scotland, UK.), BL(; Department of Astronomy, California Institute of Technology, Pasadena, CA 91125.), BM(; US Naval Observatory, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420.), BN(; Princeton University Observatory, Princeton, NJ 08544.), BO(; Department of Physics, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213-3890.), BP(; Department of Physics, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213-3890.), BQ(; Department of Astronomy and Research Center for the Early Universe, School of Science, University of Tokyo, Tokyo 113-0033, Japan.), BR(; Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195.), BS(; US Naval Observatory, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420.), BT(; Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218.), BU(; Space Telescope Science Institute, Baltimore, MD 21218.), BV(; Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195.), BW(; Astronomy and Astrophysics Center, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637.), BX(; Princeton University Observatory, Princeton, NJ 08544.), BY(; Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802.), BZ(; Department of Astronomy and Research Center for the Early Universe, School of Science, University of Tokyo, Tokyo 113-0033, Japan.), CA(; Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195.), CB(; Department of Astronomy, University of Maryland, College Park, MD 20742-2421.), CC(; Department of Physics, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213-3890.), CD(; Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510.), CE(; Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195.), CF(; Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218.), CG(; Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany.), CH(; Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218.), CI(; Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218.), CJ(; Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510.), CK(; Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218.), CL(; Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510.), CM(; Department of Physics, Drexel University, Philadelphia, PA 19104.), CN(; Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195.), CO(; Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510.), CP(; National Astronomical Observatory, Mitaka, Tokyo 181-8588, Japan.), CQ(; Astronomy and Astrophysics Center, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637.)
Publication:
The Astronomical Journal, Volume 121, Issue 5, pp. 2358-2380. (AJ Homepage)
Publication Date:
05/2001
Origin:
UCP
AJ Keywords:
Galaxies: Fundamental Parameters, Galaxies: Photometry, Galaxies: Statistics
DOI:
10.1086/320405
Bibliographic Code:
2001AJ....121.2358B

Abstract

In the course of its commissioning observations, the Sloan Digital Sky Survey (SDSS) has produced one of the largest redshift samples of galaxies selected from CCD images. Using 11,275 galaxies complete to r*=17.6 over 140 deg2, we compute the luminosity function of galaxies in the r* band over a range -23<Mr*<-16 (for h=1). The result is well-described by a Schechter function with parameters φ*=(1.46+/-0.12)×10-2 h3 Mpc-3, M*=-20.83+/-0.03, and α=-1.20+/-0.03. The implied luminosity density in r* is j~(2.6+/-0.3)×108h Lsolar Mpc-3. We find that the surface brightness selection threshold has a negligible impact for Mr*<-18. Using subsets of the data, we measure the luminosity function in the u*, g*, i*, and z* bands as well; the slope at low luminosities ranges from α=-1.35 to α=-1.2. We measure the bivariate distribution of r* luminosity with half-light surface brightness, intrinsic g*-r* color, and morphology. In agreement with previous studies, we find that high surface brightness, red, highly concentrated galaxies are on average more luminous than low surface brightness, blue, less concentrated galaxies. An important feature of the SDSS luminosity function is the use of Petrosian magnitudes, which measure a constant fraction of a galaxy's total light regardless of the amplitude of its surface brightness profile. If we synthesize results for RGKC band or bj band using these Petrosian magnitudes, we obtain luminosity densities 2 times that found by the Las Campanas Redshift Survey in RGKC and 1.4 times that found by the Two Degree Field Galaxy Redshift Survey in bj. However, we are able to reproduce the luminosity functions obtained by these surveys if we also mimic their isophotal limits for defining galaxy magnitudes, which are shallower and more redshift dependent than the Petrosian magnitudes used by the SDSS. Based on observations obtained with the Sloan Digital Sky Survey.
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