TY - JOUR
T1 - THE PHASE SPACE of ∼ 1.2 SpARCS CLUSTERS
T2 - USING HERSCHEL to PROBE DUST TEMPERATURE AS A FUNCTION of ENVIRONMENT and ACCRETION HISTORY
AU - Noble, A. G.
AU - Webb, T. M.A.
AU - Yee, H. K.C.
AU - Muzzin, A.
AU - Wilson, G.
AU - Burg, R. F.J.Van Der
AU - Balogh, M. L.
AU - Shupe, D. L.
N1 - Publisher Copyright:
© 2015. The American Astronomical Society. All rights reserved.
PY - 2016/1/10
Y1 - 2016/1/10
N2 - We present a five-band Herschel study (100-500 μm) of three galaxy clusters at from the Spitzer Adaptation of the Red-Sequence Cluster Survey. With a sample of 120 spectroscopically confirmed cluster members, we investigate the role of environment on galaxy properties utilizing the projected cluster phase space (line-of-sight velocity versus clustercentric radius), which probes the time-averaged galaxy density to which a galaxy has been exposed. We divide cluster galaxies into phase-space bins of , tracing a sequence of accretion histories in phase space. Stacking optically star-forming cluster members on the Herschel maps, we measure average infrared star formation rates, and, for the first time in high-redshift galaxy clusters, dust temperatures for dynamically distinct galaxy populations - namely, recent infalls and those that were accreted onto the cluster at an earlier epoch. Proceeding from the infalling to virialized (central) regions of phase space, we find a steady decrease in the specific star formation rate and increase in the stellar age of star-forming cluster galaxies. We perform a probability analysis to investigate all acceptable infrared spectral energy distributions within the full parameter space and measure a drop in the average dust temperature of cluster galaxies in an intermediate phase-space bin, compared to an otherwise flat trend with phase space. We suggest one plausible quenching mechanism which may be consistent with these trends, invoking ram-pressure stripping of the warmer dust for galaxies within this intermediate accretion phase.
AB - We present a five-band Herschel study (100-500 μm) of three galaxy clusters at from the Spitzer Adaptation of the Red-Sequence Cluster Survey. With a sample of 120 spectroscopically confirmed cluster members, we investigate the role of environment on galaxy properties utilizing the projected cluster phase space (line-of-sight velocity versus clustercentric radius), which probes the time-averaged galaxy density to which a galaxy has been exposed. We divide cluster galaxies into phase-space bins of , tracing a sequence of accretion histories in phase space. Stacking optically star-forming cluster members on the Herschel maps, we measure average infrared star formation rates, and, for the first time in high-redshift galaxy clusters, dust temperatures for dynamically distinct galaxy populations - namely, recent infalls and those that were accreted onto the cluster at an earlier epoch. Proceeding from the infalling to virialized (central) regions of phase space, we find a steady decrease in the specific star formation rate and increase in the stellar age of star-forming cluster galaxies. We perform a probability analysis to investigate all acceptable infrared spectral energy distributions within the full parameter space and measure a drop in the average dust temperature of cluster galaxies in an intermediate phase-space bin, compared to an otherwise flat trend with phase space. We suggest one plausible quenching mechanism which may be consistent with these trends, invoking ram-pressure stripping of the warmer dust for galaxies within this intermediate accretion phase.
KW - galaxies: clusters: general
KW - galaxies: evolution
KW - galaxies: high-redshift
KW - galaxies: star formation
KW - infrared: galaxies
UR - http://www.scopus.com/inward/record.url?scp=84954422848&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84954422848&partnerID=8YFLogxK
U2 - 10.3847/0004-637X/816/2/48
DO - 10.3847/0004-637X/816/2/48
M3 - Article
AN - SCOPUS:84954422848
SN - 0004-637X
VL - 816
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 48
ER -