학술논문
Redshift evolution of the dynamical properties of massive galaxies from SDSS-III/BOSS
Document Type
Working Paper
Author
Beifiori, Alessandra; Thomas, Daniel; Maraston, Claudia; Steele, Oliver; Masters, Karen L.; Pforr, Janine; Saglia, Roberto P.; Bender, Ralf; Tojeiro, Rita; Chen, Yan-Mei; Bolton, Adam; Brownstein, Joel R.; Johansson, Jonas; Leauthaud, Alexie; Nichol, Robert C.; Schneider, Donald P.; Senger, Robert; Skibba, Ramin; Wake, David; Pan, Kaike; Snedden, Stephanie; Bizyaev, Dmitry; Brewington, Howard; Malanushenko, Viktor; Malanushenko, Elena; Oravetz, Daniel; Simmons, Audrey; Shelden, Alaina; Ebelke, Garrett
Source
Subject
Language
Abstract
We 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 0.12sigma 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/Mstar~ (1+z)^{-0.30+/- 0.12} further strengthening the evidence for an increase of Mdyn/Mstar 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.
Comment: 26 pages, 17 figures, 5 tables. Accepted for publication in The Astrophysical Journal
Comment: 26 pages, 17 figures, 5 tables. Accepted for publication in The Astrophysical Journal