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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.authorDe Lucia, Gabriella
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.identifier.citationDennis W. Just et al 2019 ApJ 885 6en_US
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 σ 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 ~30%–70% of the z = 0 cluster population lies outside the virial radius at z ~ 0.6. For analogous clusters at z = 0, we calculate that the ratio of galaxies that have fallen into the clusters since z ~ 0.6 to those that were already in the core at that redshift is typically between ~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 lesssim σ lesssim 1200 km s−1. Within the infall regions of z ~ 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.publisherAmerican Astronomical Societyen_US
dc.rights© 2019. The American Astronomical Society. All rights reserved.en_US
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
kusw.kuauthorRudnick, Gregory H.
kusw.kudepartmentPhysics and Astronomyen_US
kusw.oanotesPer Sherpa Romeo 12/23/2020:

Astrophysical Journal [Open panel below]Publication Information TitleAstrophysical Journal [English] ISSNs Print: 0004-637X Electronic: 1538-4357 URL Publishers American Astronomical Society [Client Organisation] IOP Publishing [Society Publisher] [Open panel below]Publisher Policy Open Access pathways permitted by this journal's policy are listed below by article version. Click on a pathway for a more detailed view.

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kusw.oaversionScholarly/refereed, publisher versionen_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US

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