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Title: A PARAMETERIZED GALAXY CATALOG SIMULATOR FOR TESTING CLUSTER FINDING, MASS ESTIMATION, AND PHOTOMETRIC REDSHIFT ESTIMATION IN OPTICAL AND NEAR-INFRARED SURVEYS

Abstract

We present a galaxy catalog simulator that converts N-body simulations with halo and subhalo catalogs into mock, multiband photometric catalogs. The simulator assigns galaxy properties to each subhalo in a way that reproduces the observed cluster galaxy halo occupation distribution, the radial and mass-dependent variation in fractions of blue galaxies, the luminosity functions in the cluster and the field, and the color-magnitude relation in clusters. Moreover, the evolution of these parameters is tuned to match existing observational constraints. Parameterizing an ensemble of cluster galaxy properties enables us to create mock catalogs with variations in those properties, which in turn allows us to quantify the sensitivity of cluster finding to current observational uncertainties in these properties. Field galaxies are sampled from existing multiband photometric surveys of similar depth. We present an application of the catalog simulator to characterize the selection function and contamination of a galaxy cluster finder that utilizes the cluster red sequence together with galaxy clustering on the sky. We estimate systematic uncertainties in the selection to be at the {<=}15% level with current observational constraints on cluster galaxy populations and their evolution. We find the contamination in this cluster finder to be {approx}35% to redshift z {approx} 0.6.more » In addition, we use the mock galaxy catalogs to test the optical mass indicator B{sub gc} and a red-sequence redshift estimator. We measure the intrinsic scatter of the B{sub gc}-mass relation to be approximately log normal with {sigma}{sub log10M}{approx}0.25 and we demonstrate photometric redshift accuracies for massive clusters at the {approx}3% level out to z {approx} 0.7.« less

Authors:
 [1];  [2]; ;  [3];  [4];  [5]
  1. Department of Physics, University of Michigan, Ann Arbor, MI 48109 (United States)
  2. Department of Physics, Ludwig-Maximilians-Universitaet, 81679 Muenchen (Germany)
  3. Department of Physics and Astrophysics, University of North Dakota, Grand Forks, ND 58202 (United States)
  4. Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
  5. Max-Planck-Institut fuer Astrophysik, 85748 Garching bei Muenchen (Germany)
Publication Date:
OSTI Identifier:
22016298
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 747; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CATALOGS; COLOR; COSMOLOGY; GALACTIC EVOLUTION; GALAXIES; GALAXY CLUSTERS; INFRARED SURVEYS; LUMINOSITY; MASS; NONLUMINOUS MATTER; RED SHIFT

Citation Formats

Song, Jeeseon, Mohr, Joseph J, Barkhouse, Wayne A, Rude, Cody, Warren, Michael S, and Dolag, Klaus. A PARAMETERIZED GALAXY CATALOG SIMULATOR FOR TESTING CLUSTER FINDING, MASS ESTIMATION, AND PHOTOMETRIC REDSHIFT ESTIMATION IN OPTICAL AND NEAR-INFRARED SURVEYS. United States: N. p., 2012. Web. doi:10.1088/0004-637X/747/1/58.
Song, Jeeseon, Mohr, Joseph J, Barkhouse, Wayne A, Rude, Cody, Warren, Michael S, & Dolag, Klaus. A PARAMETERIZED GALAXY CATALOG SIMULATOR FOR TESTING CLUSTER FINDING, MASS ESTIMATION, AND PHOTOMETRIC REDSHIFT ESTIMATION IN OPTICAL AND NEAR-INFRARED SURVEYS. United States. https://doi.org/10.1088/0004-637X/747/1/58
Song, Jeeseon, Mohr, Joseph J, Barkhouse, Wayne A, Rude, Cody, Warren, Michael S, and Dolag, Klaus. Thu . "A PARAMETERIZED GALAXY CATALOG SIMULATOR FOR TESTING CLUSTER FINDING, MASS ESTIMATION, AND PHOTOMETRIC REDSHIFT ESTIMATION IN OPTICAL AND NEAR-INFRARED SURVEYS". United States. https://doi.org/10.1088/0004-637X/747/1/58.
@article{osti_22016298,
title = {A PARAMETERIZED GALAXY CATALOG SIMULATOR FOR TESTING CLUSTER FINDING, MASS ESTIMATION, AND PHOTOMETRIC REDSHIFT ESTIMATION IN OPTICAL AND NEAR-INFRARED SURVEYS},
author = {Song, Jeeseon and Mohr, Joseph J and Barkhouse, Wayne A and Rude, Cody and Warren, Michael S and Dolag, Klaus},
abstractNote = {We present a galaxy catalog simulator that converts N-body simulations with halo and subhalo catalogs into mock, multiband photometric catalogs. The simulator assigns galaxy properties to each subhalo in a way that reproduces the observed cluster galaxy halo occupation distribution, the radial and mass-dependent variation in fractions of blue galaxies, the luminosity functions in the cluster and the field, and the color-magnitude relation in clusters. Moreover, the evolution of these parameters is tuned to match existing observational constraints. Parameterizing an ensemble of cluster galaxy properties enables us to create mock catalogs with variations in those properties, which in turn allows us to quantify the sensitivity of cluster finding to current observational uncertainties in these properties. Field galaxies are sampled from existing multiband photometric surveys of similar depth. We present an application of the catalog simulator to characterize the selection function and contamination of a galaxy cluster finder that utilizes the cluster red sequence together with galaxy clustering on the sky. We estimate systematic uncertainties in the selection to be at the {<=}15% level with current observational constraints on cluster galaxy populations and their evolution. We find the contamination in this cluster finder to be {approx}35% to redshift z {approx} 0.6. In addition, we use the mock galaxy catalogs to test the optical mass indicator B{sub gc} and a red-sequence redshift estimator. We measure the intrinsic scatter of the B{sub gc}-mass relation to be approximately log normal with {sigma}{sub log10M}{approx}0.25 and we demonstrate photometric redshift accuracies for massive clusters at the {approx}3% level out to z {approx} 0.7.},
doi = {10.1088/0004-637X/747/1/58},
url = {https://www.osti.gov/biblio/22016298}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 747,
place = {United States},
year = {2012},
month = {3}
}