A spitzer-selected galaxy cluster at z = 1.62

C. Papovich, I. Momcheva, C. N A Willmer, K. D. Finkelstein, S. L. Finkelstein, K. V. Tran, M. Brodwin, J. S. Dunlop, D. Farrah, S. A. Khan, J. Lotz, P. McCarthy, R. J. McLure, Marcia J Rieke, G. Rudnick, S. Sivanandam, F. Pacaud, M. Pierre

Research output: Contribution to journalArticle

194 Citations (Scopus)

Abstract

We report the discovery of a galaxy cluster at z = 1.62 located in the Spitzer Wide-Area Infrared Extragalactic survey XMM-LSS field. This structure was selected solely as an overdensity of galaxies with red Spitzer/Infrared Array Camera colors, satisfying ([3.6] - [4.5])AB> - 0.1mag. Photometric redshifts derived from the Subaru XMM Deep Survey (BViz bands), the UKIRT Infrared Deep Survey-Ultra-Deep Survey (UKIDSS-UDS, JK bands), and from the Spitzer Public UDS survey (3.6-8.0 μm) show that this cluster corresponds to a surface density of galaxies at z 1.6 that is >20σ above the mean at this redshift. We obtained optical spectroscopic observations of galaxies in the cluster region using IMACS on the Magellan telescope. We measured redshifts for seven galaxies in the range z = 1.62-1.63 within 2.8arcmin (<1.4Mpc) of the astrometric center of the cluster. A posteriori analysis of the XMM data in this field reveal a weak (4σ) detection in the [0.5-2keV] band compatible with the expected thermal emission from such a cluster. The color-magnitude diagram of the galaxies in this cluster shows a prominent red sequence, dominated by a population of red galaxies with (z - J)>1.7mag. The photometric-redshift probability distributions for the red galaxies are strongly peaked at z = 1.62, coincident with the spectroscopically confirmed galaxies. The rest-frame (U - B) color and scatter of galaxies on the red sequence are consistent with a mean luminosity-weighted age of 1.2 0.1Gyr, yielding a formation redshift , and corresponding to the last significant star formation period in these galaxies.

Original languageEnglish (US)
Pages (from-to)1503-1513
Number of pages11
JournalAstrophysical Journal
Volume716
Issue number2
DOIs
StatePublished - 2010

Fingerprint

galaxies
XMM-Newton telescope
large-scale structure of the universe
color
star formation
cameras
luminosity
telescopes

Keywords

  • Galaxies: clusters: general
  • Galaxies: clusters: individual (ClG 0218.3-0510)
  • Galaxies: evolution
  • Large-scale structure of universe

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Papovich, C., Momcheva, I., Willmer, C. N. A., Finkelstein, K. D., Finkelstein, S. L., Tran, K. V., ... Pierre, M. (2010). A spitzer-selected galaxy cluster at z = 1.62. Astrophysical Journal, 716(2), 1503-1513. https://doi.org/10.1088/0004-637X/716/2/1503

A spitzer-selected galaxy cluster at z = 1.62. / Papovich, C.; Momcheva, I.; Willmer, C. N A; Finkelstein, K. D.; Finkelstein, S. L.; Tran, K. V.; Brodwin, M.; Dunlop, J. S.; Farrah, D.; Khan, S. A.; Lotz, J.; McCarthy, P.; McLure, R. J.; Rieke, Marcia J; Rudnick, G.; Sivanandam, S.; Pacaud, F.; Pierre, M.

In: Astrophysical Journal, Vol. 716, No. 2, 2010, p. 1503-1513.

Research output: Contribution to journalArticle

Papovich, C, Momcheva, I, Willmer, CNA, Finkelstein, KD, Finkelstein, SL, Tran, KV, Brodwin, M, Dunlop, JS, Farrah, D, Khan, SA, Lotz, J, McCarthy, P, McLure, RJ, Rieke, MJ, Rudnick, G, Sivanandam, S, Pacaud, F & Pierre, M 2010, 'A spitzer-selected galaxy cluster at z = 1.62', Astrophysical Journal, vol. 716, no. 2, pp. 1503-1513. https://doi.org/10.1088/0004-637X/716/2/1503
Papovich C, Momcheva I, Willmer CNA, Finkelstein KD, Finkelstein SL, Tran KV et al. A spitzer-selected galaxy cluster at z = 1.62. Astrophysical Journal. 2010;716(2):1503-1513. https://doi.org/10.1088/0004-637X/716/2/1503
Papovich, C. ; Momcheva, I. ; Willmer, C. N A ; Finkelstein, K. D. ; Finkelstein, S. L. ; Tran, K. V. ; Brodwin, M. ; Dunlop, J. S. ; Farrah, D. ; Khan, S. A. ; Lotz, J. ; McCarthy, P. ; McLure, R. J. ; Rieke, Marcia J ; Rudnick, G. ; Sivanandam, S. ; Pacaud, F. ; Pierre, M. / A spitzer-selected galaxy cluster at z = 1.62. In: Astrophysical Journal. 2010 ; Vol. 716, No. 2. pp. 1503-1513.
@article{3777bdce2177402fb83f12b3c994a3ea,
title = "A spitzer-selected galaxy cluster at z = 1.62",
abstract = "We report the discovery of a galaxy cluster at z = 1.62 located in the Spitzer Wide-Area Infrared Extragalactic survey XMM-LSS field. This structure was selected solely as an overdensity of galaxies with red Spitzer/Infrared Array Camera colors, satisfying ([3.6] - [4.5])AB> - 0.1mag. Photometric redshifts derived from the Subaru XMM Deep Survey (BViz bands), the UKIRT Infrared Deep Survey-Ultra-Deep Survey (UKIDSS-UDS, JK bands), and from the Spitzer Public UDS survey (3.6-8.0 μm) show that this cluster corresponds to a surface density of galaxies at z 1.6 that is >20σ above the mean at this redshift. We obtained optical spectroscopic observations of galaxies in the cluster region using IMACS on the Magellan telescope. We measured redshifts for seven galaxies in the range z = 1.62-1.63 within 2.8arcmin (<1.4Mpc) of the astrometric center of the cluster. A posteriori analysis of the XMM data in this field reveal a weak (4σ) detection in the [0.5-2keV] band compatible with the expected thermal emission from such a cluster. The color-magnitude diagram of the galaxies in this cluster shows a prominent red sequence, dominated by a population of red galaxies with (z - J)>1.7mag. The photometric-redshift probability distributions for the red galaxies are strongly peaked at z = 1.62, coincident with the spectroscopically confirmed galaxies. The rest-frame (U - B) color and scatter of galaxies on the red sequence are consistent with a mean luminosity-weighted age of 1.2 0.1Gyr, yielding a formation redshift , and corresponding to the last significant star formation period in these galaxies.",
keywords = "Galaxies: clusters: general, Galaxies: clusters: individual (ClG 0218.3-0510), Galaxies: evolution, Large-scale structure of universe",
author = "C. Papovich and I. Momcheva and Willmer, {C. N A} and Finkelstein, {K. D.} and Finkelstein, {S. L.} and Tran, {K. V.} and M. Brodwin and Dunlop, {J. S.} and D. Farrah and Khan, {S. A.} and J. Lotz and P. McCarthy and McLure, {R. J.} and Rieke, {Marcia J} and G. Rudnick and S. Sivanandam and F. Pacaud and M. Pierre",
year = "2010",
doi = "10.1088/0004-637X/716/2/1503",
language = "English (US)",
volume = "716",
pages = "1503--1513",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2",

}

TY - JOUR

T1 - A spitzer-selected galaxy cluster at z = 1.62

AU - Papovich, C.

AU - Momcheva, I.

AU - Willmer, C. N A

AU - Finkelstein, K. D.

AU - Finkelstein, S. L.

AU - Tran, K. V.

AU - Brodwin, M.

AU - Dunlop, J. S.

AU - Farrah, D.

AU - Khan, S. A.

AU - Lotz, J.

AU - McCarthy, P.

AU - McLure, R. J.

AU - Rieke, Marcia J

AU - Rudnick, G.

AU - Sivanandam, S.

AU - Pacaud, F.

AU - Pierre, M.

PY - 2010

Y1 - 2010

N2 - We report the discovery of a galaxy cluster at z = 1.62 located in the Spitzer Wide-Area Infrared Extragalactic survey XMM-LSS field. This structure was selected solely as an overdensity of galaxies with red Spitzer/Infrared Array Camera colors, satisfying ([3.6] - [4.5])AB> - 0.1mag. Photometric redshifts derived from the Subaru XMM Deep Survey (BViz bands), the UKIRT Infrared Deep Survey-Ultra-Deep Survey (UKIDSS-UDS, JK bands), and from the Spitzer Public UDS survey (3.6-8.0 μm) show that this cluster corresponds to a surface density of galaxies at z 1.6 that is >20σ above the mean at this redshift. We obtained optical spectroscopic observations of galaxies in the cluster region using IMACS on the Magellan telescope. We measured redshifts for seven galaxies in the range z = 1.62-1.63 within 2.8arcmin (<1.4Mpc) of the astrometric center of the cluster. A posteriori analysis of the XMM data in this field reveal a weak (4σ) detection in the [0.5-2keV] band compatible with the expected thermal emission from such a cluster. The color-magnitude diagram of the galaxies in this cluster shows a prominent red sequence, dominated by a population of red galaxies with (z - J)>1.7mag. The photometric-redshift probability distributions for the red galaxies are strongly peaked at z = 1.62, coincident with the spectroscopically confirmed galaxies. The rest-frame (U - B) color and scatter of galaxies on the red sequence are consistent with a mean luminosity-weighted age of 1.2 0.1Gyr, yielding a formation redshift , and corresponding to the last significant star formation period in these galaxies.

AB - We report the discovery of a galaxy cluster at z = 1.62 located in the Spitzer Wide-Area Infrared Extragalactic survey XMM-LSS field. This structure was selected solely as an overdensity of galaxies with red Spitzer/Infrared Array Camera colors, satisfying ([3.6] - [4.5])AB> - 0.1mag. Photometric redshifts derived from the Subaru XMM Deep Survey (BViz bands), the UKIRT Infrared Deep Survey-Ultra-Deep Survey (UKIDSS-UDS, JK bands), and from the Spitzer Public UDS survey (3.6-8.0 μm) show that this cluster corresponds to a surface density of galaxies at z 1.6 that is >20σ above the mean at this redshift. We obtained optical spectroscopic observations of galaxies in the cluster region using IMACS on the Magellan telescope. We measured redshifts for seven galaxies in the range z = 1.62-1.63 within 2.8arcmin (<1.4Mpc) of the astrometric center of the cluster. A posteriori analysis of the XMM data in this field reveal a weak (4σ) detection in the [0.5-2keV] band compatible with the expected thermal emission from such a cluster. The color-magnitude diagram of the galaxies in this cluster shows a prominent red sequence, dominated by a population of red galaxies with (z - J)>1.7mag. The photometric-redshift probability distributions for the red galaxies are strongly peaked at z = 1.62, coincident with the spectroscopically confirmed galaxies. The rest-frame (U - B) color and scatter of galaxies on the red sequence are consistent with a mean luminosity-weighted age of 1.2 0.1Gyr, yielding a formation redshift , and corresponding to the last significant star formation period in these galaxies.

KW - Galaxies: clusters: general

KW - Galaxies: clusters: individual (ClG 0218.3-0510)

KW - Galaxies: evolution

KW - Large-scale structure of universe

UR - http://www.scopus.com/inward/record.url?scp=77953168109&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77953168109&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/716/2/1503

DO - 10.1088/0004-637X/716/2/1503

M3 - Article

AN - SCOPUS:77953168109

VL - 716

SP - 1503

EP - 1513

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

ER -