TY - JOUR
T1 - The role of environment in galaxy evolution in the SERVS Survey I
T2 - density maps and cluster candidates
AU - Krefting, Nick
AU - Sajina, Anna
AU - Lacy, Mark
AU - Nyland, Kristina
AU - Farrah, Duncan
AU - Darvish, Behnam
AU - Duivenvoorden, Steven
AU - Duncan, Ken
AU - Gonzalez-Perez, Violeta
AU - Lagos, Claudia del P.
AU - Oliver, Seb
AU - Shirley, Raphael
AU - Vaccari, Mattia
N1 - 26 pages, 12 figures, accepted for publication in ApJ
PY - 2020/2/5
Y1 - 2020/2/5
N2 - We use photometric redshifts derived from new u-band through 4.5 μm Spitzer IRAC photometry in the 4.8 deg2 of the XMM-LSS
field to construct surface density maps in the redshift range of
0.1–1.5. Our density maps show evidence for large-scale structure in the
form of filaments spanning several tens of megaparsecs. Using these
maps, we identify 339 overdensities that our simulated light-cone
analysis suggests are likely associated with dark matter halos with
masses, Mhalo, log(Mhalo/M⊙)
> 13.7. From this list of overdensities we recover 43 of 70 known
X-ray-detected and spectroscopically confirmed clusters. The missing
X-ray clusters are largely at lower redshifts and lower masses than our
target log(Mhalo/M⊙) > 13.7. The
bulk of the overdensities are compact, but a quarter show extended
morphologies that include likely projection effects, clusters embedded
in apparent filaments, and at least one potential cluster merger (at z ~ 1.28). The strongest overdensity in our highest-redshift slice (at z ~ 1.5) shows a compact red galaxy core, potentially implying a massive evolved cluster.
AB - We use photometric redshifts derived from new u-band through 4.5 μm Spitzer IRAC photometry in the 4.8 deg2 of the XMM-LSS
field to construct surface density maps in the redshift range of
0.1–1.5. Our density maps show evidence for large-scale structure in the
form of filaments spanning several tens of megaparsecs. Using these
maps, we identify 339 overdensities that our simulated light-cone
analysis suggests are likely associated with dark matter halos with
masses, Mhalo, log(Mhalo/M⊙)
> 13.7. From this list of overdensities we recover 43 of 70 known
X-ray-detected and spectroscopically confirmed clusters. The missing
X-ray clusters are largely at lower redshifts and lower masses than our
target log(Mhalo/M⊙) > 13.7. The
bulk of the overdensities are compact, but a quarter show extended
morphologies that include likely projection effects, clusters embedded
in apparent filaments, and at least one potential cluster merger (at z ~ 1.28). The strongest overdensity in our highest-redshift slice (at z ~ 1.5) shows a compact red galaxy core, potentially implying a massive evolved cluster.
KW - astro-ph.GA
U2 - 10.3847/1538-4357/ab60a0
DO - 10.3847/1538-4357/ab60a0
M3 - Article
SN - 0004-637X
VL - 889
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
ER -