Abstract
We measure the projected spatial correlation function wp(rp) 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.
| Original language | English |
|---|---|
| Pages (from-to) | 1838-1851 |
| Number of pages | 14 |
| Journal | Astrophysical Journal |
| Volume | 698 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2009 Jun 20 |
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All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
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Spatial clustering from Galex-SDSS samples : Star formation history and large-scale clustering. / Heinis, Sébastien; Budavári, Tamás; Szalay, Alex S.; Arnouts, Stéphane; Aragón-Calvo, Miguel A.; Wyder, Ted K.; Barlow, Tom A.; Foster, Karl; Peter, Friedman G.; Martin, D. Christopher; Morrissey, Patrick; Neff, Susan G.; Schiminovich, David; Seibert, Mark; Bianchi, Luciana; Donas, José; Heckman, Timothy M.; Lee, Young Wook; Madore, Barry F.; Milliard, Bruno; Michael Rich, R.; Yi, Sukyoung K.
In: Astrophysical Journal, Vol. 698, No. 2, 20.06.2009, p. 1838-1851.Research output: Contribution to journal › Article
TY - JOUR
T1 - Spatial clustering from Galex-SDSS samples
T2 - Star formation history and large-scale clustering
AU - Heinis, Sébastien
AU - Budavári, Tamás
AU - Szalay, Alex S.
AU - Arnouts, Stéphane
AU - Aragón-Calvo, Miguel A.
AU - Wyder, Ted K.
AU - Barlow, Tom A.
AU - Foster, Karl
AU - Peter, Friedman G.
AU - Martin, D. Christopher
AU - Morrissey, Patrick
AU - Neff, Susan G.
AU - Schiminovich, David
AU - Seibert, Mark
AU - Bianchi, Luciana
AU - Donas, José
AU - Heckman, Timothy M.
AU - Lee, Young Wook
AU - Madore, Barry F.
AU - Milliard, Bruno
AU - Michael Rich, R.
AU - Yi, Sukyoung K.
PY - 2009/6/20
Y1 - 2009/6/20
N2 - We measure the projected spatial correlation function wp(rp) 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.
AB - We measure the projected spatial correlation function wp(rp) 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.
UR - http://www.scopus.com/inward/record.url?scp=77955692840&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77955692840&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/698/2/1838
DO - 10.1088/0004-637X/698/2/1838
M3 - Article
AN - SCOPUS:77955692840
VL - 698
SP - 1838
EP - 1851
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2
ER -