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dc.contributor.authorBeifiori, Alessandra
dc.contributor.authorThomas, Daniel
dc.contributor.authorMaraston, Claudia
dc.contributor.authorSteele, Oliver
dc.contributor.authorMasters, Karen L.
dc.contributor.authorPforr, Janine
dc.contributor.authorSaglia, Roberto P.
dc.contributor.authorBender, Ralf
dc.contributor.authorTojeiro, Rita
dc.contributor.authorChen, Yan-Mei
dc.contributor.authorBolton, Adam
dc.contributor.authorBrownstein, Joel R.
dc.contributor.authorJohansson, Jonas
dc.contributor.authorLeauthaud, Alexie
dc.contributor.authorNichol, Robert C.
dc.contributor.authorSchneider, Donald P.
dc.contributor.authorSenger, Robert
dc.contributor.authorSkibba, Ramin
dc.contributor.authorWake, David
dc.contributor.authorPan, Kaike
dc.contributor.authorSnedden, Stephanie
dc.contributor.authorBizyaev, Dmitry
dc.contributor.authorBrewington, Howard
dc.contributor.authorMalanushenko, Viktor
dc.contributor.authorMalanushenko, Elena
dc.contributor.authorOravetz, Daniel
dc.contributor.authorSimmons, Audrey
dc.contributor.authorShelden, Alaina
dc.contributor.authorEbelke, Garrett
dc.identifier.citationBeifiori , A , Thomas , D , Maraston , C , Steele , O , Masters , K L , Pforr , J , Saglia , R P , Bender , R , Tojeiro , R , Chen , Y-M , Bolton , A , Brownstein , J R , Johansson , J , Leauthaud , A , Nichol , R C , Schneider , D P , Senger , R , Skibba , R , Wake , D , Pan , K , Snedden , S , Bizyaev , D , Brewington , H , Malanushenko , V , Malanushenko , E , Oravetz , D , Simmons , A , Shelden , A & Ebelke , G 2014 , ' Redshift evolution of the dynamical properties of massive galaxies from SDSS-III/BOSS ' , Astrophysical Journal , vol. 789 .
dc.identifier.otherPURE: 157306782
dc.identifier.otherPURE UUID: 790b640d-08be-4882-9c25-eb4af07a236f
dc.identifier.otherBibCode: 2014ApJ...789...92B
dc.identifier.otherScopus: 84903288640
dc.description.abstractWe study the redshift evolution of the dynamical properties of ~180, 000 massive galaxies from SDSS-III/BOSS combined with a local early-type galaxy sample from SDSS-II in the redshift range 0.1 ≤ z ≤ 0.6. The typical stellar mass of this sample is M∗ ~2 × 1011 M☉. We analyze the evolution of the galaxy parameters effective radius, stellar velocity dispersion, and the dynamical to stellar mass ratio with redshift. As the effective radii of BOSS galaxies at these redshifts are not well resolved in the Sloan Digital Sky Survey (SDSS) imaging we calibrate the SDSS size measurements with Hubble Space Telescope/COSMOS photometry for a sub-sample of galaxies. We further apply a correction for progenitor bias to build a sample which consists of a coeval, passively evolving population. Systematic errors due to size correction and the calculation of dynamical mass are assessed through Monte Carlo simulations. At fixed stellar or dynamical mass, we find moderate evolution in galaxy size and stellar velocity dispersion, in agreement with previous studies. We show that this results in a decrease of the dynamical to stellar mass ratio with redshift at >2σ significance. By combining our sample with high-redshift literature data, we find that this evolution of the dynamical to stellar mass ratio continues beyond z ~ 0.7 up to z > 2 as Mdyn/M* ~(1 + z)−0.30 ± 0.12, further strengthening the evidence for an increase of Mdyn/M* with cosmic time. This result is in line with recent predictions from galaxy formation simulations based on minor merger driven mass growth, in which the dark matter fraction within the half-light radius increases with cosmic time.
dc.relation.ispartofAstrophysical Journalen
dc.rights© 2014. The American Astronomical Society. All rights reserved.en
dc.subjectGalaxies: elliptical and lenticularen
dc.subjectGalaxies: evolutionen
dc.subjectGalaxies: formationen
dc.subjectGalaxies: high-redshiften
dc.subjectGalaxies: kinematics and dynamicsen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleRedshift evolution of the dynamical properties of massive galaxies from SDSS-III/BOSSen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.description.statusPeer revieweden

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