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What turns galaxies off? : the different morphologies of star-forming and quiescent galaxies since z ∼ 2 from CANDELS

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Abstract
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.
Keywords
DIGITAL SKY SURVEY, MEDIUM-BAND SURVEY, EXTRAGALACTIC LEGACY SURVEY, COSMIC EVOLUTION SURVEY, ACTIVE GALACTIC NUCLEI, K-SELECTED GALAXIES, DEEP FIELD-SOUTH, MASSIVE GALAXIES, STELLAR MASS, ELLIPTIC GALAXIES, galaxies: elliptical and lenticular, cD, galaxies: evolution, galaxies: general, galaxies: structure

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Chicago
Bell, Eric F, Arjen van der Wel, Casey Papovich, Dale Kocevski, Jennifer Lotz, Daniel H McIntosh, Jeyhan Kartaltepe, et al. 2012. “What Turns Galaxies Off? : the Different Morphologies of Star-forming and Quiescent Galaxies Since z ∼ 2 from CANDELS.” Astrophysical Journal 753 (2).
APA
Bell, E. F., van der Wel, A., Papovich, C., Kocevski, D., Lotz, J., McIntosh, D. H., Kartaltepe, J., et al. (2012). What turns galaxies off? : the different morphologies of star-forming and quiescent galaxies since z ∼ 2 from CANDELS. ASTROPHYSICAL JOURNAL, 753(2).
Vancouver
1.
Bell EF, van der Wel A, Papovich C, Kocevski D, Lotz J, McIntosh DH, et al. What turns galaxies off? : the different morphologies of star-forming and quiescent galaxies since z ∼ 2 from CANDELS. ASTROPHYSICAL JOURNAL. 2012;753(2).
MLA
Bell, Eric F, Arjen van der Wel, Casey Papovich, et al. “What Turns Galaxies Off? : the Different Morphologies of Star-forming and Quiescent Galaxies Since z ∼ 2 from CANDELS.” ASTROPHYSICAL JOURNAL 753.2 (2012): n. pag. Print.
@article{8573776,
  abstract     = {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.},
  articleno    = {167},
  author       = {Bell, Eric F and van der Wel, Arjen and Papovich, Casey and Kocevski, Dale and Lotz, Jennifer and McIntosh, Daniel H and Kartaltepe, Jeyhan and Faber, SM and Ferguson, Harry and Koekemoer, Anton and Grogin, Norman and Wuyts, Stijn and Cheung, Edmond and Conselice, Christopher J and Dekel, Avishai and Dunlop, James S and Giavalisco, Mauro and Herrington, Jessica and Koo, David C and McGrath, Elizabeth J and de Mello, Duilia and Rix, Hans-Walter and Robaina, Aday R and Williams, Christina C},
  issn         = {0004-637X},
  journal      = {ASTROPHYSICAL JOURNAL},
  keywords     = {DIGITAL SKY SURVEY,MEDIUM-BAND SURVEY,EXTRAGALACTIC LEGACY SURVEY,COSMIC EVOLUTION SURVEY,ACTIVE GALACTIC NUCLEI,K-SELECTED GALAXIES,DEEP FIELD-SOUTH,MASSIVE GALAXIES,STELLAR MASS,ELLIPTIC GALAXIES,galaxies: elliptical and lenticular,cD,galaxies: evolution,galaxies: general,galaxies: structure},
  language     = {eng},
  number       = {2},
  pages        = {18},
  title        = {What turns galaxies off? : the different morphologies of star-forming and quiescent galaxies since z ∼ 2 from CANDELS},
  url          = {http://dx.doi.org/10.1088/0004-637X/753/2/167},
  volume       = {753},
  year         = {2012},
}

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