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dc.contributor.authorJi, Zhiyuan
dc.contributor.authorGiavalisco, Mauro
dc.contributor.authorWilliams, Christina C.
dc.contributor.authorFaber, Sandra M.
dc.contributor.authorFerguson, Henry C.
dc.contributor.authorGuo, Yicheng
dc.contributor.authorLiu, Teng
dc.contributor.authorLee, Bomee
dc.date.accessioned2018-12-03T23:49:49Z
dc.date.available2018-12-03T23:49:49Z
dc.date.issued2018-08-01
dc.identifier.citationZhiyuan Ji et al 2018 ApJ 862 135en_US
dc.identifier.issn1538-4357
dc.identifier.doi10.3847/1538-4357/aacc2c
dc.identifier.urihttp://hdl.handle.net/10150/631097
dc.description.abstractWe report evidence of environmental quenching among galaxies at redshifts of approximate to 2, namely the probability that a galaxy quenches its star formation activity is enhanced in the regions of space in proximity of other quenched, more massive galaxies. The effect is observed as strong clustering of quiescent galaxies around quiescent galaxies on angular scales of theta <= 20 arcsec, corresponding to a proper (comoving) scale of 168 (502) kpc at z = 2. The effect is observed only for quiescent galaxies around other quiescent galaxies; the probability to find star-forming galaxies around quiescent or around star-forming ones is consistent with the clustering strength of galaxies of the same mass and at the same redshift, as observed in dedicated studies of galaxy clustering. The effect is mass dependent in the sense that the quenching probability is stronger for galaxies of smaller masses (M* < 10(10) M-circle dot) than for more massive ones, i. e., it follows the opposite trend with mass relative to gravitational galaxy clustering. The spatial scale where the effect is observed suggests that these environments are massive halos, in which case the observed effect would likely be satellite quenching. The effect is also redshift dependent in that the clustering strength of quiescent galaxies around other quiescent galaxies at <(z)over bar> = 1.6 is approximate to 1.7x larger than that of the galaxies with the same stellar mass at (Z) over bar = 2.6. This redshift dependence allows for a crude estimate of the timescale of environmental quenching of low-mass galaxies, which is in the range of 1.5 similar to 4 Gyr, in broad agreement with other estimates and with our ideas on satellite quenching.en_US
dc.description.sponsorshipNASA through Space Telescope Science Institute under NASA [GO-12060, GO-12099, NAS5-26555]en_US
dc.language.isoenen_US
dc.publisherIOP PUBLISHING LTDen_US
dc.relation.urlhttp://stacks.iop.org/0004-637X/862/i=2/a=135?key=crossref.3091b21e4372d9ea54827ffd462afb7ben_US
dc.rights© 2018. The American Astronomical Society. All rights reserved.en_US
dc.subjectcosmology: observationsen_US
dc.subjectgalaxies: evolutionen_US
dc.subjectgalaxies: high-redshiften_US
dc.titleEvidence of Environmental Quenching at Redshift z approximate to 2en_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.identifier.journalASTROPHYSICAL JOURNALen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleThe Astrophysical Journal
dc.source.volume862
dc.source.issue2
dc.source.beginpage135
refterms.dateFOA2018-12-03T23:49:49Z


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