The Galaxy Luminosity Function and Luminosity Density at Redshift z=0.1

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dc.creatorBlanton, Michael R.
dc.creatorHogg, David W.
dc.creatorBrinkmann, J.
dc.creatorConnolly, Andrew J.
dc.creatorCsabai, Istvan
dc.creatorBahcall, Neta A.
dc.creatorFukugita, Masataka
dc.creatorLoveday, Jon
dc.creatorMeiksin, Avery
dc.creatorMunn, Jeffrey A.
dc.creatorNichol, R. C.
dc.creatorOkamura, Sadanori
dc.creatorQuinn, Thomas
dc.creatorSchneider, Donald P.
dc.creatorShimasaku, Kazuhiro
dc.creatorStrauss, Michael A.
dc.creatorTegmark, Max
dc.creatorVogeley, Michael S.
dc.creatorWeinberg, David H.
dc.date2002-10-09
dc.date.accessioned2026-07-07T12:00:52Z
dc.date.available2026-07-07T12:00:52Z
dc.descriptionUsing a catalog of 147,986 galaxy redshifts and fluxes from the Sloan Digital Sky Survey (SDSS) we measure the galaxy luminosity density at z=0.1 in five optical bandpasses corresponding to the SDSS bandpasses shifted to match their restframe shape at z=0.1. We denote the bands {0.1}{u}, {0.1}{g}, {0.1}{r}, {0.1}{i}, {0.1}{z}, with λ_{eff} = [3216, 4240, 5595, 6792, 8111] Angstroms respectively. We use a maximum likelihood method which allows for a general form for the shape of the luminosity function, simple luminosity and number evolution, incorporates flux uncertainties, and accounts for the flux limits of the survey. We find luminosity densities at z=0.1 in absolute AB magnitudes in a Mpc^3 of [-14.10 \pm 0.15, -15.18 \pm 0.03, -15.90 \pm 0.03, -16.24 \pm 0.03, -16.56 \pm 0.02] in [{0.1}{u}, {0.1}{g}, {0.1}{r}, {0.1}{i}, {0.1}{z}], respectively, using Ω_0 =0.3, Ω_Λ=0.7, and h=1, and using Petrosian magnitudes. Similar results are obtained using Sersic model magnitudes, suggesting that flux from outside the Petrosian apertures is not a major correction. In the {0.1}{r} band, the best fit Schechter function to our results has ϕ_\ast = (1.49 \pm 0.04) \times 10^{-2} h^3 Mpc^{-3}, M_\ast - 5\log_{10} h = -20.44 \pm 0.01, and α= -1.05\pm 0.01. In solar luminosities, the luminosity density in {0.1}{r} is (1.84 \pm 0.04) h 10^8 L_{{0.1}{r},\odot} Mpc^{-3}. Our results are consistent with other estimates of the luminosity density, from the Two-degree Field Galaxy Redshift Survey and the Millenium Galaxy Catalog. They represent a substantial change (\sim 0.5 mag) from earlier SDSS luminosity density results based on commissioning data, almost entirely because of the inclusion of evolution in the luminosity function model.
dc.descriptionsubmitted to ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0210215
dc.identifierhttp://arxiv.org/abs/astro-ph/0210215
dc.identifierAstrophys.J.592:819-838,2003
dc.identifierdoi:10.1086/375776
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206925
dc.subjectAstrophysics
dc.titleThe Galaxy Luminosity Function and Luminosity Density at Redshift z=0.1
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