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dc.contributor.authorJust, Dennis W.
dc.contributor.authorKirby, Matthew
dc.contributor.authorZaritsky, Dennis
dc.contributor.authorRudnick, Gregory
dc.contributor.authorDesjardins, Tyler
dc.contributor.authorCool, Richard
dc.contributor.authorMoustakas, John
dc.contributor.authorClowe, Douglas
dc.contributor.authorLucia, Gabriella De
dc.contributor.authorAragón-Salamanca, Alfonso
dc.contributor.authorDesai, Vandana
dc.contributor.authorFinn, Rose
dc.contributor.authorHalliday, Claire
dc.contributor.authorJablonka, Pascale
dc.contributor.authorMann, Justin
dc.contributor.authorPoggianti, Bianca
dc.contributor.authorBian, Fu-Yan
dc.contributor.authorLiebst, Kelley
dc.date.accessioned2019-12-04T23:18:53Z
dc.date.available2019-12-04T23:18:53Z
dc.date.issued2019-10-24
dc.identifier.citationDennis W. Just et al 2019 ApJ 885 6en_US
dc.identifier.issn0004-637X
dc.identifier.doi10.3847/1538-4357/ab44a0
dc.identifier.urihttp://hdl.handle.net/10150/636260
dc.description.abstractWe present results from a low-resolution spectroscopic survey for 21 galaxy clusters at 0.4 < z < 0.8 selected from the ESO Distant Cluster Survey. We measured spectra using the low-dispersion prism in IMACS on the Magellan Baade telescope and calculate redshifts with an accuracy of sigma(z) = 0.007. We find 1763 galaxies that are brighter than R = 22.9 in the large-scale cluster environs. We identify the galaxies expected to be accreted by the clusters as they evolve to z = 0 using spherical infall models and find that similar to 30%-70% of the z = 0 cluster population lies outside the virial radius at z similar to 0.6. For analogous clusters at z = 0, we calculate that the ratio of galaxies that have fallen into the clusters since z similar to 0.6 to those that were already in the core at that redshift is typically between similar to 0.3 and 1.5. This wide range of ratios is due to intrinsic scatter and is not a function of velocity dispersion, so a variety of infall histories is to be expected for clusters with current velocity dispersions of 300 km s(-1) less than or similar to sigma less than or similar to 1200 km s(-1). Within the infall regions of z similar to 0.6 clusters, we find a larger red fraction of galaxies than in the field and greater clustering among red galaxies than blue. We interpret these findings as evidence of "preprocessing," where galaxies in denser local environments have their star formation rates affected prior to their aggregation into massive clusters, although the possibility of backsplash galaxies complicates the interpretation.en_US
dc.description.sponsorshipNASA LTSA award [NNG05GE82G]; NASA GALEX grant [NNX11AI47G]; European Research Council under European Community's Seventh Framework Programme (FP7/2007-2013)/ERC grant [202781]; Swiss National Science Foundation (SNSF)Swiss National Science Foundation (SNSF)en_US
dc.language.isoenen_US
dc.publisherIOP PUBLISHING LTDen_US
dc.rightsCopyright © 2019. The American Astronomical Society. All rights reserved.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectgalaxies: distances and redshiftsen_US
dc.subjectgalaxies: evolutionen_US
dc.subjectgalaxies: interactionsen_US
dc.titlePreprocessing among the Infalling Galaxy Population of EDisCS Clustersen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.contributor.departmentUniv Arizona, Dept Physen_US
dc.contributor.departmentUniv Arizona, MMT 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.volume885
dc.source.issue1
dc.source.beginpage6
refterms.dateFOA2019-12-04T23:18:54Z


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