Browsing by Author "Khochfar, S."

Now showing items 21-26 of 26

    • On the formation of massive galaxies : A simultaneous study of number density, size and intrinsic colour evolution in GOODS 

      Ferreras, I.; Lisker, T.; Pasquali, A.; Khochfar, S.; Kaviraj, S. (2009-07-01)
      The evolution of number density, size and intrinsic colour is determined for a volume-limited sample of visually classified early-type galaxies selected from the Hubble Space Telescope/Advanced Camera for Surveys images ...

    • Recent star formation in high-redshift early-type galaxies : Insights from the rest-frame UV 

      Kaviraj, S.; Khochfar, S.; Schawinski, K.; Silk, J.; Yi, S.K.; Gawiser, E.; Van Dokkum, P.G. (2007-06)
      We combine deep UBV RIzJK photometry from the MUSYC survey with redshifts from the COMBO-17 survey to study the rest-frame ultraviolet (UV) properties of 674 high-redshift (0.5 <z <1) early-type galaxies, drawn from the ...

    • The role of minor mergers in the recent star formation history of early-type galaxies 

      Kaviraj, S.; Peirani, S.; Khochfar, S.; Silk, J.; Kay, S. (2009-04-01)
      We demonstrate that the large scatter in the ultraviolet (UV) colours of intermediate-mass early-type galaxies in the local Universe and the inferred low-level recent star formation (RSF) in these objects can be reproduced ...

    • Suppression of star formation in early-type galaxies by feedback from supermassive black holes 

      Schawinski, K.; Khochfar, S.; Kaviraj, S.; Yi, S.K.; Lee, Y.-W.; Boselli, A.; Donas, J.; Milliard, B.; Barlow, T.; Conrow, T.; Forster, K.; Friedman, P.G.; Martin, D.C.; Morrissey, P.; Seibert, M.; Small, T.; Wyder, T.K.; Neff, S.; Schiminovich, D.; Bianchi, L.; Heckman, T.; Szalay, A.; Madore, B.; Rich, R.M. (2006-08-24)
      Detailed high-resolution observations of the innermost regions of nearby galaxies have revealed the presence of supermassive black holes. These black holes may interact with their host galaxies by means of 'feedback' in ...

    • The UV colours of high-redshift early-type galaxies : Evidence for recent star formation and stellar mass assembly over the last 8 billion years 

      Kaviraj, S.; Khochfar, S.; Schawinski, K.; Silk, J.; Yi, S.K.; Gawiser, E.; Virani, S.N.; Cardamone, C.N.; van Dokkum, P.G.; Urry, C.M. (2008-07)
      We combine deep optical and NIR (UBVRIzJK) photometry from the Multiwavelength Survey by Yale-Chile (MUSYC) with redshifts from the COMBO-17 survey to perform a large-scale study of the rest-frame ultraviolet (UV) properties ...

    • UV-optical colors as probes of early-type galaxy evolution 

      Kaviraj, S.; Schawinski, K.; Devriendt, J.E.G.; Ferreras, I.; Khochfar, S.; Yoon, S.-J.; Yi, S.K.; Lee, Y.-W.; Deharveng, J.-M.; Boselli, A.; Donas, J.; Milliard, B.; Barlow, T.; Conrow, T.; Forster, K.; Friedman, P.G.; Martin, D.C.; Morrissey, P.; Seibert, M.; Small, T.; Wyder, T.; Neff, S.; Schiminovich, D.; Bianchi, L.; Heckman, T.; Szalay, A.; Madore, B.; Rich, R.M. (2007-12-01)
      We have studied ∼2100 early-type galaxies in the SDSS DR3 which have been detected by the GALEX Medium Imaging Survey (MIS), in the redshift range O <z <0.1.1. Combining GALEXUV photometry with corollary optical data from ...