CANDELS Observations Of The Structural Properties Of Cluster Galaxies At Z=1.62

dc.contributor.utaustinauthorFinkelstein, Steven L.en_US
dc.contributor.utaustinauthorFinkelstein, Keely Den_US
dc.creatorPapovich, Caseyen_US
dc.creatorBassett, Roberten_US
dc.creatorLotz, Jennifer M.en_US
dc.creatorvan der Wel, A.en_US
dc.creatorTran, K. V.en_US
dc.creatorFinkelstein, Steven L.en_US
dc.creatorBell, Eric F.en_US
dc.creatorConselice, Christopher J.en_US
dc.creatorDekel, Avishaien_US
dc.creatorDunlop, J. S.en_US
dc.creatorGuo, Y. C.en_US
dc.creatorFaber, S. M.en_US
dc.creatorFarrah, D.en_US
dc.creatorFerguson, Henry C.en_US
dc.creatorFinkelstein, Keely D.en_US
dc.creatorHaussler, Borisen_US
dc.creatorKocevski, D. D.en_US
dc.creatorKoekemoer, A. M.en_US
dc.creatorKoo, D. C.en_US
dc.creatorMcGrath, E. J.en_US
dc.creatorMcLure, R. J.en_US
dc.creatorMcIntosh, Daniel H.en_US
dc.creatorMomcheva, I.en_US
dc.creatorNewman, Jeffrey A.en_US
dc.creatorRudnick, Gregoryen_US
dc.creatorWeiner, B.en_US
dc.creatorWillmer, Christopher N. A.en_US
dc.creatorWuyts, S.en_US
dc.description.abstractWe discuss the structural and morphological properties of galaxies in a z = 1.62 proto-cluster using near-IR imaging data from Hubble Space Telescope Wide Field Camera 3 data of the Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey (CANDELS). The cluster galaxies exhibit a clear color-morphology relation: galaxies with colors of quiescent stellar populations generally have morphologies consistent with spheroids, and galaxies with colors consistent with ongoing star formation have disk-like and irregular morphologies. The size distribution of the quiescent cluster galaxies shows a deficit of compact (less than or similar to 1 kpc), massive galaxies compared to CANDELS field galaxies at z = 1.6. As a result, the cluster quiescent galaxies have larger average effective sizes compared to field galaxies at fixed mass at greater than 90% significance. Combined with data from the literature, the size evolution of quiescent cluster galaxies is relatively slow from z similar or equal to 1.6 to the present, growing as (1 + z)(-0.6 +/- 0.1). If this result is generalizable, then it implies that physical processes associated with the denser cluster region seem to have caused accelerated size growth in quiescent galaxies prior to z = 1.6 and slower subsequent growth at z < 1.6 compared to galaxies in the lower density field. The quiescent cluster galaxies at z = 1.6 have higher ellipticities compared to lower redshift samples at fixed mass, and their surface-brightness profiles suggest that they contain extended stellar disks. We argue that the cluster galaxies require dissipationless (i.e., gas-poor or "dry") mergers to reorganize the disk material and to match the relations for ellipticity, stellar mass, size, and color of early-type galaxies in z < 1 clusters.en_US
dc.description.sponsorshipNASA NAS5-26555en_US
dc.description.sponsorshipHST GO-12060en_US
dc.description.sponsorshipNASA through from the Space Telescope Science Institute GO-12060en_US
dc.description.sponsorshipEuropean Research Councilen_US
dc.description.sponsorshipRoyal Societyen_US
dc.description.sponsorshipTexas AM Universityen_US
dc.description.sponsorshipGeorge P. and Cynthia Woods Institute for Fundamental Physics and Astronomyen_US
dc.identifier.citationPapovich, C., R. Bassett, J. M. Lotz, A. van der Wel, K-V. Tran, S. L. Finkelstein, E. F. Bell et al. "CANDELS Observations of the Structural Properties of Cluster Galaxies at z= 1.62." The Astrophysical Journal, Vol. 750, No. 2 (May., 2012): 93.en_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectgalaxies: clusters: generalen_US
dc.subjectgalaxies: clusters: individualen_US
dc.subjectgalaxies: elliptical and lenticular, cden_US
dc.subjectgalaxies: high-redshiften_US
dc.subjectgalaxies: structureen_US
dc.subjectsimilar-to 2en_US
dc.subjectcolor-magnitude relationen_US
dc.subjecthigh-redshift galaxiesen_US
dc.subjectpassively evolving galaxiesen_US
dc.subjectmorphology-density relationen_US
dc.subjectextragalactic legacy surveyen_US
dc.subjectelliptic galaxiesen_US
dc.subjectstar-forming galaxiesen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleCANDELS Observations Of The Structural Properties Of Cluster Galaxies At Z=1.62en_US

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