Journal
ASTROPHYSICAL JOURNAL
Volume 773, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/773/1/37
Keywords
galaxies: elliptical and lenticular, cD; galaxies: luminosity function, mass function; galaxies: photometry
Categories
Funding
- NSF of China [10973011, 10833006, 11003015]
- Chinese Academy of Sciences
- NAOC
- NSFC [11033006, 11121062]
- CAS/SAFEA International Partnership Program for Creative Research Teams [KJCX2-YW-T23]
- Alfred P. Sloan Foundation
- National Aeronautics and Space Administration
- National Science Foundation
- U.S. Department of Energy
- Japanese Monbukagakusho
- Max Planck Society
- University of Chicago
- Fermilab
- Institute for Advanced Study
- Japan Participation Group
- Johns Hopkins University
- Korean Scientist Group
- Los Alamos National Laboratory
- Max-Planck-Institute for Astronomy (MPIA)
- Max-Planck-Institute for Astrophysics (MPA)
- New Mexico State University
- University of Pittsburgh
- Princeton University
- United States Naval Observatory
- University of Washington
- Science and Technology Facilities Council [ST/J001562/1] Funding Source: researchfish
- STFC [ST/J001562/1] Funding Source: UKRI
Ask authors/readers for more resources
We perform photometric analyses of a bright early-type galaxy sample with 2949 galaxies (M-r < -22.5 mag) in the redshift range of 0.05-0.15, drawn from the Sloan Digital Sky Survey (SDSS) DR7 with morphological classification from Galaxy Zoo 1. We measure the Petrosian and isophotal magnitudes, as well as the corresponding half-light radius for each galaxy. We find that for the brightest galaxies (M-r < -23 mag), our Petrosian magnitudes and isophotal magnitudes to 25 mag arcsec(-2) and 1% of the sky brightness are on average 0.16 mag, 0.20 mag, and 0.26 mag brighter than the SDSS Petrosian values, respectively. In the first case, the underestimations are caused by overestimations in the sky background by the SDSS PHOTO algorithm, while the latter two are also due to deeper photometry. Similarly, the typical half-light radii (r(50)) measured by the SDSS algorithm are smaller than our measurements. As a result, the bright end of the r-band luminosity function is found to decline more slowly than previous works. Our measured luminosity densities at the bright end are more than one order of magnitude higher than those of Blanton et al., and the stellar mass densities at M-* similar to 5 x 10(11) M-circle dot and M-* similar to 10(12) M-circle dot are a few tenths and a factor of a few higher than those of Bernardi et al. These results may significantly alleviate the tension in the assembly of massive galaxies between observations and predictions of the hierarchical structure formation model.
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