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Title: Percolation galaxy groups and clusters in the sdss redshift survey: identification, catalogs, and the multiplicity function

Abstract

We identify galaxy groups and clusters in volume-limited samples of the SDSS redshift survey, using a redshift-space friends-of-friends algorithm. We optimize the friends-of-friends linking lengths to recover galaxy systems that occupy the same dark matter halos, using a set of mock catalogs created by populating halos of N-body simulations with galaxies. Extensive tests with these mock catalogs show that no combination of perpendicular and line-of-sight linking lengths is able to yield groups and clusters that simultaneously recover the true halo multiplicity function, projected size distribution, and velocity dispersion. We adopt a linking length combination that yields, for galaxy groups with ten or more members: a group multiplicity function that is unbiased with respect to the true halo multiplicity function; an unbiased median relation between the multiplicities of groups and their associated halos; a spurious group fraction of less than {approx}1%; a halo completeness of more than {approx}97%; the correct projected size distribution as a function of multiplicity; and a velocity dispersion distribution that is {approx}20% too low at all multiplicities. These results hold over a range of mock catalogs that use different input recipes of populating halos with galaxies. We apply our group-finding algorithm to the SDSS data and obtainmore » three group and cluster catalogs for three volume-limited samples that cover 3495.1 square degrees on the sky. We correct for incompleteness caused by fiber collisions and survey edges, and obtain measurements of the group multiplicity function, with errors calculated from realistic mock catalogs. These multiplicity function measurements provide a key constraint on the relation between galaxy populations and dark matter halos.« less

Authors:
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Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
892454
Report Number(s):
FERMILAB-PUB-06-008-A
arXiv eprint number astro-ph/0601346; TRN: US200702%%302
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Journal Article
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALGORITHMS; DISTRIBUTION; FIBERS; GALAXIES; MULTIPLICITY; NONLUMINOUS MATTER; SKY; VELOCITY; Astrophysics

Citation Formats

Berlind, Andreas A, Frieman, Joshua A, Weinberg, David H, Blanton, Michael R, Warren, Michael S, Abazajian, Kevork, Scranton, Ryan, Hogg, David W, Scoccimarro, Roman, Bahcall, Neta A, Brinkmann, J, Gott, J.Richard, III, Kleinman, S J, Krzesinski, J, Lee, Brian C, Miller, Christopher J, Nitta, Atsuko, Schneider, Donald P, Tucker, Douglas L, Zehavi, Idit, /CCPP, New York /Chicago U., Astron. Astrophys. Ctr. /Ohio State U., Dept. Astron. /Los Alamos /Pittsburgh U. /Princeton U. /Subaru Telescope /ApachePoint Observ. /Mt. Suhora Observ., Cracow /LBL, Berkeley /Cerro-Tololo InterAmerican Obs. /Penn State U., Astron. Astrophys. /Fermilab /Arizona U., Astron. Dept. - Steward Observ./Case Western Reserve U., and. Percolation galaxy groups and clusters in the sdss redshift survey: identification, catalogs, and the multiplicity function. United States: N. p., 2006. Web. doi:10.1086/508170.
Berlind, Andreas A, Frieman, Joshua A, Weinberg, David H, Blanton, Michael R, Warren, Michael S, Abazajian, Kevork, Scranton, Ryan, Hogg, David W, Scoccimarro, Roman, Bahcall, Neta A, Brinkmann, J, Gott, J.Richard, III, Kleinman, S J, Krzesinski, J, Lee, Brian C, Miller, Christopher J, Nitta, Atsuko, Schneider, Donald P, Tucker, Douglas L, Zehavi, Idit, /CCPP, New York /Chicago U., Astron. Astrophys. Ctr. /Ohio State U., Dept. Astron. /Los Alamos /Pittsburgh U. /Princeton U. /Subaru Telescope /ApachePoint Observ. /Mt. Suhora Observ., Cracow /LBL, Berkeley /Cerro-Tololo InterAmerican Obs. /Penn State U., Astron. Astrophys. /Fermilab /Arizona U., Astron. Dept. - Steward Observ./Case Western Reserve U., &. Percolation galaxy groups and clusters in the sdss redshift survey: identification, catalogs, and the multiplicity function. United States. doi:10.1086/508170.
Berlind, Andreas A, Frieman, Joshua A, Weinberg, David H, Blanton, Michael R, Warren, Michael S, Abazajian, Kevork, Scranton, Ryan, Hogg, David W, Scoccimarro, Roman, Bahcall, Neta A, Brinkmann, J, Gott, J.Richard, III, Kleinman, S J, Krzesinski, J, Lee, Brian C, Miller, Christopher J, Nitta, Atsuko, Schneider, Donald P, Tucker, Douglas L, Zehavi, Idit, /CCPP, New York /Chicago U., Astron. Astrophys. Ctr. /Ohio State U., Dept. Astron. /Los Alamos /Pittsburgh U. /Princeton U. /Subaru Telescope /ApachePoint Observ. /Mt. Suhora Observ., Cracow /LBL, Berkeley /Cerro-Tololo InterAmerican Obs. /Penn State U., Astron. Astrophys. /Fermilab /Arizona U., Astron. Dept. - Steward Observ./Case Western Reserve U., and. Sun . "Percolation galaxy groups and clusters in the sdss redshift survey: identification, catalogs, and the multiplicity function". United States. doi:10.1086/508170. https://www.osti.gov/servlets/purl/892454.
@article{osti_892454,
title = {Percolation galaxy groups and clusters in the sdss redshift survey: identification, catalogs, and the multiplicity function},
author = {Berlind, Andreas A and Frieman, Joshua A and Weinberg, David H and Blanton, Michael R and Warren, Michael S and Abazajian, Kevork and Scranton, Ryan and Hogg, David W and Scoccimarro, Roman and Bahcall, Neta A and Brinkmann, J and Gott, J.Richard, III and Kleinman, S J and Krzesinski, J and Lee, Brian C and Miller, Christopher J and Nitta, Atsuko and Schneider, Donald P and Tucker, Douglas L and Zehavi, Idit and /CCPP, New York /Chicago U., Astron. Astrophys. Ctr. /Ohio State U., Dept. Astron. /Los Alamos /Pittsburgh U. /Princeton U. /Subaru Telescope /ApachePoint Observ. /Mt. Suhora Observ., Cracow /LBL, Berkeley /Cerro-Tololo InterAmerican Obs. /Penn State U., Astron. Astrophys. /Fermilab /Arizona U., Astron. Dept. - Steward Observ./Case Western Reserve U. and },
abstractNote = {We identify galaxy groups and clusters in volume-limited samples of the SDSS redshift survey, using a redshift-space friends-of-friends algorithm. We optimize the friends-of-friends linking lengths to recover galaxy systems that occupy the same dark matter halos, using a set of mock catalogs created by populating halos of N-body simulations with galaxies. Extensive tests with these mock catalogs show that no combination of perpendicular and line-of-sight linking lengths is able to yield groups and clusters that simultaneously recover the true halo multiplicity function, projected size distribution, and velocity dispersion. We adopt a linking length combination that yields, for galaxy groups with ten or more members: a group multiplicity function that is unbiased with respect to the true halo multiplicity function; an unbiased median relation between the multiplicities of groups and their associated halos; a spurious group fraction of less than {approx}1%; a halo completeness of more than {approx}97%; the correct projected size distribution as a function of multiplicity; and a velocity dispersion distribution that is {approx}20% too low at all multiplicities. These results hold over a range of mock catalogs that use different input recipes of populating halos with galaxies. We apply our group-finding algorithm to the SDSS data and obtain three group and cluster catalogs for three volume-limited samples that cover 3495.1 square degrees on the sky. We correct for incompleteness caused by fiber collisions and survey edges, and obtain measurements of the group multiplicity function, with errors calculated from realistic mock catalogs. These multiplicity function measurements provide a key constraint on the relation between galaxy populations and dark matter halos.},
doi = {10.1086/508170},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}