TY - JOUR
T1 - WHAT TURNS GALAXIES OFF? THE DIFFERENT MORPHOLOGIES OF STAR-FORMING AND QUIESCENT GALAXIES SINCE z similar to 2 FROM CANDELS
AU - Bell, Eric F.
AU - van der Wel, Arjen
AU - Papovich, Casey
AU - Kocevski, Dale
AU - Lotz, Jennifer
AU - McIntosh, Daniel H.
AU - Kartaltepe, Jeyhan
AU - Faber, S. M.
AU - Ferguson, Harry
AU - Koekemoer, Anton
AU - Grogin, Norman
AU - Wuyts, Stijn
AU - Cheung, Edmond
AU - Conselice, Christopher J.
AU - Dekel, Avishai
AU - Dunlop, James S.
AU - Giavalisco, Mauro
AU - Herrington, Jessica
AU - Koo, David C.
AU - McGrath, Elizabeth J.
AU - de Mello, Duilia
AU - Rix, Hans-Walter
AU - Robaina, Aday R.
AU - Williams, Christina C.
PY - 2012/7/10
Y1 - 2012/7/10
N2 - We use HST/WFC3 imaging from the CANDELS Multi-Cycle Treasury Survey, in conjunction with the Sloan Digital Sky Survey, to explore the evolution of galactic structure structure for galaxies with stellar masses >3 x 10(10) M-circle dot from z = 2.2 to the present epoch, a time span of 10 Gyr. We explore the relationship between rest-frame optical color, stellar mass, star formation activity, and galaxy structure. We confirm the dramatic increase from z = 2.2 to the present day in the number density of non-star-forming galaxies above 3 x 10(10) M-circle dot reported by others. We further find that the vast majority of these quiescent systems have concentrated light profiles, as parameterized by the Sersic index, and the population of concentrated galaxies grows similarly rapidly. We examine the joint distribution of star formation activity, Sersic index, stellar mass, inferred velocity dispersion, and stellar surface density. Quiescence correlates poorly with stellar mass at all z < 2.2. Quiescence correlates well with Sersic index at all redshifts. Quiescence correlates well with "velocity dispersion" and stellar surface density at z > 1.3, and somewhat less well at lower redshifts. Yet, there is significant scatter between quiescence and galaxy structure: while the vast majority of quiescent galaxies have prominent bulges, many of them have significant disks, and a number of bulge-dominated galaxies have significant star formation. Noting the rarity of quiescent galaxies without prominent bulges, we argue that a prominent bulge (and perhaps, by association, a supermassive black hole) is an important condition for quenching star formation on galactic scales over the last 10 Gyr, in qualitative agreement with the active galactic nucleus feedback paradigm.
AB - We use HST/WFC3 imaging from the CANDELS Multi-Cycle Treasury Survey, in conjunction with the Sloan Digital Sky Survey, to explore the evolution of galactic structure structure for galaxies with stellar masses >3 x 10(10) M-circle dot from z = 2.2 to the present epoch, a time span of 10 Gyr. We explore the relationship between rest-frame optical color, stellar mass, star formation activity, and galaxy structure. We confirm the dramatic increase from z = 2.2 to the present day in the number density of non-star-forming galaxies above 3 x 10(10) M-circle dot reported by others. We further find that the vast majority of these quiescent systems have concentrated light profiles, as parameterized by the Sersic index, and the population of concentrated galaxies grows similarly rapidly. We examine the joint distribution of star formation activity, Sersic index, stellar mass, inferred velocity dispersion, and stellar surface density. Quiescence correlates poorly with stellar mass at all z < 2.2. Quiescence correlates well with Sersic index at all redshifts. Quiescence correlates well with "velocity dispersion" and stellar surface density at z > 1.3, and somewhat less well at lower redshifts. Yet, there is significant scatter between quiescence and galaxy structure: while the vast majority of quiescent galaxies have prominent bulges, many of them have significant disks, and a number of bulge-dominated galaxies have significant star formation. Noting the rarity of quiescent galaxies without prominent bulges, we argue that a prominent bulge (and perhaps, by association, a supermassive black hole) is an important condition for quenching star formation on galactic scales over the last 10 Gyr, in qualitative agreement with the active galactic nucleus feedback paradigm.
U2 - 10.1088/0004-637X/753/2/167
DO - 10.1088/0004-637X/753/2/167
M3 - Article
SN - 0004-637X
VL - 753
SP - -
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 167
ER -