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Spatial Clustering from GALEX-SDSS Samples: Star Formation History and Large-Scale Clustering

Heinis, Sébastien and Budavári, Tamás and Szalay, Alex S. and Arnouts, Stéphane and Aragόn-Calvo, Miguel A. and Wyder, Ted K. and Barlow, Tom A. and Foster, Karl and Peter, Friedman G. and Martin, D. Christopher and Morrissey, Patrick and Neff, Susan G. and Schiminovich, David and Seibert, Mark and Bianchi, Luciana and Donas, José and Heckman, Timothy M. and Lee, Young-Wook and Madore, Barry F. and Milliard, Bruno and Rich, R. Michael and Yi, Sukyoung K. (2009) Spatial Clustering from GALEX-SDSS Samples: Star Formation History and Large-Scale Clustering. Astrophysical Journal, 698 (2). pp. 1838-1851. ISSN 0004-637X.

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We measure the projected spatial correlation function w_p (r_p ) from a large sample combining Galaxy Evolution Explorer ultraviolet imaging with the Sloan Digital Sky Survey spectroscopic sample. We study the dependence of the clustering strength for samples selected on (NUV – r)_(abs) color, specific star formation rate (SSFR), and stellar mass. We find that there is a smooth transition in the clustering of galaxies as a function of this color from weak clustering among blue galaxies to stronger clustering for red galaxies. The clustering of galaxies within the "green valley" has an intermediate strength, and is consistent with that expected from galaxy groups. The results are robust to the correction for dust extinction. The comparison with simple analytical modeling suggests that the halo occupation number increases with older star formation epochs. When splitting according to SSFR, we find that the SSFR is a more sensitive tracer of environment than stellar mass.

Item Type:Article
Related URLs:
URLURL TypeDescription
Foster, Karl0000-0001-5800-5531
Martin, D. Christopher0000-0002-8650-1644
Morrissey, Patrick0000-0001-8177-1023
Seibert, Mark0000-0002-1143-5515
Bianchi, Luciana0000-0001-7746-5461
Madore, Barry F.0000-0002-1576-1676
Rich, R. Michael0000-0003-0427-8387
Additional Information:© 2009. The American Astronomical Society. Received 2008 December 8; accepted 2009 April 21; published 2009 June 4. We thank Ching-Wa Yip for useful discussions. GALEX (Galaxy Evolution Explorer) is a NASA Small Explorer, launched in 2003 April. We gratefully acknowledge NASAs support for construction, operation, and science analysis for the GALEX mission, developed in cooperation with the Centre National d(tm)Etudes Spatiales of France and the Korean Ministry of Science and Technology.
Group:Space Astrophysics Laboratory
Funding AgencyGrant Number
Subject Keywords:ultraviolet: galaxies
Issue or Number:2
Record Number:CaltechAUTHORS:20090828-130619755
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Official Citation:Spatial Clustering from GALEX-SDSS Samples: Star Formation History and Large-Scale Clustering Sébastien Heinis, Tamás Budavári, Alex S. Szalay, Stéphane Arnouts, Miguel A. Aragón-Calvo, Ted K. Wyder, Tom A. Barlow, Karl Foster, Friedman G. Peter, D. Christopher Martin, Patrick Morrissey, Susan G. Neff, David Schiminovich, Mark Seibert, Luciana Bianchi, José Donas, Timothy M. Heckman, Young-Wook Lee, Barry F. Madore, Bruno Milliard, R. Michael Rich, and Sukyoung K. Yi 2009 ApJ 698 1838-1851 doi: 10.1088/0004-637X/698/2/1838
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:15415
Deposited By: Ruth Sustaita
Deposited On:11 Sep 2009 22:35
Last Modified:09 Mar 2020 20:59

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