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Related papers: Comparing PyMorph and SDSS photometry. I. Backgrou…

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The Sloan Digital Sky Survey pipeline photometry underestimates the brightnesses of the most luminous galaxies. This is mainly because (i) the SDSS overestimates the sky background and (ii) single or two-component Sersic-based models better…

Astrophysics of Galaxies · Physics 2017-07-19 M. Bernardi , J. -L. Fischer , R. K. Sheth , A. Meert , M. Huertas-Company , F. Shankar , V. Vikram

In addition to the large systematic differences arising from assumptions about the stellar mass-to-light ratio, the massive end of the stellar mass function is rather sensitive to how one fits the light profiles of the most luminous…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 M. Bernardi , A. Meert , R. K. Sheth , V. Vikram , M. Huertas-Company , S. Mei , F. Shankar

We quantify the systematics in the size-luminosity relation of galaxies in the SDSS main sample which arise from fitting different 1- and 2-component model profiles to the images. In objects brighter than L*, fitting a single Sersic profile…

Cosmology and Nongalactic Astrophysics · Physics 2014-06-05 M. Bernardi , A. Meert , V. Vikram , M. Huertas-Company , S. Mei , F. Shankar , R. K. Sheth

We describe a procedure for background subtracting Sloan Digital Sky Survey (SDSS) imaging that improves the resulting detection and photometry of large galaxies on the sky. Within each SDSS drift scan run, we mask out detected sources and…

Instrumentation and Methods for Astrophysics · Physics 2015-05-28 Michael R. Blanton , Eyal Kazin , Demitri Muna , Benjamin A. Weaver , Adrian Price-Whelan

We present the results of fitting simulations of an unbiased sample of SDSS galaxies utilizing the fitting routine GALFIT and analysis pipeline PyMorph. These simulations are used to test the two-dimensional decompositions of SDSS galaxies.…

Cosmology and Nongalactic Astrophysics · Physics 2013-06-10 Alan Meert , Vinu Vikram , Mariangela Bernardi

We perform photometric analyses for a bright early-type galaxy (ETG) sample with 2949 galaxies ($M_{\rm r}<-22.5$ mag) in the redshift range of 0.05 to 0.15, drawn from the SDSS DR7 with morphological classification from Galaxy Zoo 1. We…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Y. Q. He , X. Y. Xia , C. N. Hao , Y. P. Jing , S. Mao , Cheng Li

We present number counts, luminosity functions (LFs) and luminosity densities of galaxies obtained using the Sloan Digital Sky Survey Sixth Data Release in all SDSS photometric bands. Thanks to the SDSS DR6, galaxy statistics have increased…

Astrophysics · Physics 2009-11-19 Antonio D. Montero-Dorta , Francisco Prada

The lensing of background QSOs by foreground galaxies is a powerful probe of the mass density of the Universe and the power spectrum of mass clustering. However, the 2dF QSO survey suggested that a strong anticorrelation effect at g<21 was…

Astrophysics · Physics 2009-11-13 G. Mountrichas , T. Shanks

The incidence of sub-galactic level substructures is an important quantity, as it is a generic prediction of high-resolution Cold Dark Matter (CDM) models which is susceptible to observational test. Confrontation of theory with observations…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 N. Jackson , S. E. Bryan , S. Mao , C. Li

We compare the surface brightness-inclination relation for a sample of COSMOS pure disk galaxies at z~0.7 with an artificially redshifted sample of SDSS disks well matched to the COSMOS sample in terms of rest-frame photometry and…

We present a catalogue of two-dimensional, point spread function-corrected de Vacouleurs, S\'{e}rsic, de Vacouleurs+Exponential, and S\'{e}rsic+Exponential fits of $\sim7\times10^5$ spectroscopically selected galaxies drawn from the Sloan…

Astrophysics of Galaxies · Physics 2014-11-27 Alan Meert , Vinu Vikram , Mariangela Bernardi

Because of the 3D nature of galaxies, an algorithm for constructing spatial density distribution models of galaxies on the basis of galaxy images has many advantages over surface density distribution approximations. We present a method for…

Cosmology and Nongalactic Astrophysics · Physics 2015-10-28 E. Tempel , A. Tamm , R. Kipper , P. Tenjes

The Sloan Digital Sky Survey (SDSS) was foundational to the study of galaxy evolution, having revealed the bimodality of galaxies and the relationship between their structure and star-forming activity. However, ground-based optical surveys…

Astrophysics of Galaxies · Physics 2024-04-18 Chandler Osborne , Samir Salim

We present a Fourier analysis of the clustering of galaxies in the combined Main galaxy and Luminous Red Galaxy (LRG) Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5) sample. The aim of our analysis is to consider how well we can…

Published galaxy power spectra from the 2dFGRS and SDSS are not in good agreement. We revisit this issue by analyzing both the 2dFGRS and SDSS DR5 catalogues using essentially identical techniques. We confirm that the 2dFGRS exhibits…

Astrophysics · Physics 2009-07-28 Ariel G. Sanchez , Shaun Cole

Noisy distance estimates associated with photometric rather than spectroscopic redshifts lead to a mis-estimate of the luminosities, and produce a correlated mis-estimate of the sizes. We consider a sample of early-type galaxies from the…

Astrophysics · Physics 2008-04-08 Graziano Rossi , Ravi K. Sheth

We have used the Largest Cluster Statistics and the Average Filamentarity to quantify respectively the connectivity and the shapes of the patterns seen in the galaxy distribution in two volume limited subsamples extracted from the…

Astrophysics · Physics 2009-07-07 Biswajit Pandey , Somnath Bharadwaj

We constrain the linear and quadratic bias parameters from the configuration dependence of the three-point correlation function (3PCF) in both redshift and projected space, utilizing measurements of spectroscopic galaxies in the Sloan…

We examine the relationship between environment and the luminosities, surface brightnesses, colors, and profile shapes of luminous galaxies in the Sloan Digital Sky Survey (SDSS). For the SDSS sample, galaxy color is the galaxy property…

Astrophysics · Physics 2008-11-26 M. R. Blanton , D. J. Eisenstein , D. W. Hogg , D. J. Schlegel , J. Brinkmann

The Sloan Digital Sky Survey [SDSS] has measured an optical luminosity function for galaxies in 5 bands, finding 1.5 to 2.1 times more luminosity density than previous work. This note compares the SDSS luminosity density to two recent…

Astrophysics · Physics 2009-11-06 Edward L. Wright
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