Browsing Research publications by Author "Ryan Jr., R.E."

Now showing items 1-3 of 3

    • Newborn spheroids at high redshift : When and how did the dominant, old stars in today's massive galaxies form? 

      Kaviraj, S.; Silk, J.; Ellis, R.S.; Cohen, S.; Windhorst, R.A.; Peirani, S.; O'Connell, R.W.; Whitmore, B.C.; Ryan Jr., R.E.; Hathi, N.P.; Dopita, M.A.; Frogel, J.A.; Dekel, A. (2013-01-11)
      We study ~330 massive (M > 10M), newborn spheroidal galaxies (SGs) around the epoch of peak star formation (1 <z <3) to explore the high-redshift origin of SGs and gain insight into when and how the old stellar populations ...

    • A panchromatic catalog of early-type galaxies at intermediate redshift in the Hubble Space Telescope wide field camera 3 early release science field 

      Rutkowski, M.J.; Cohen, S.H.; Windhorst, R.A.; Kaviraj, S.; Crockett, R.M.; Silk, J.; O'Connell, R.W.; Hathi, N.P.; McCarthy, P.J.; Ryan Jr., R.E.; Koekemoer, A.; Bond, H.E.; Whitmore, B.C.; Yan, H.; Kimble, R.A.; Balick, B.; Calzetti, D.; Disney, M.J.; Dopita, M.A.; Frogel, J.A.; Hall, D.N.B.; Holtzman, J. A.; Paresce, F.; Saha, A.; Trauger, J.T.; Walker, A.R.; Young, E.T. (2012-03-01)
      In the first of a series of forthcoming publications, we present a panchromatic catalog of 102 visually selected early-type galaxies (ETGs) from observations in the Early Release Science (ERS) program with the Wide Field ...

    • The size evolution of passive galaxies : observations from the Wide-Field Camera 3 Early Release Science program 

      Ryan Jr., R.E.; McCarthy, P.J.; Cohen, S.H.; Rutkowski, M.J.; Mechtley, M.R.; Windhorst, R.A.; Yan, H.; Hathi, N.P.; Koekemoer, A. M.; Bond, H.E.; Bushouse, H.; MacKenty, J.; Mutchler, M.; Whitmore, B.C.; O'Connell, R.W.; Balick, B.; Calzetti, D.; Crockett, R.M.; Kaviraj, S.; Silk, J.I.; Disney, M.; Dopita, M.A.; Frogel, J.A.; Hall, D.N.B.; Holtzman, J. A.; Kimble, R.A.; Paresce, F.; Saha, A.; Trauger, J.; Walker, A.R.; Young, E. (2012-04-10)
      We present the size evolution of passively evolving galaxies at z 2 identified in Wide-Field Camera 3 imaging from the Early Release Science program. Our sample was constructed using an analog to the passive BzK galaxy ...