Browsing University of Hertfordshire by Author "Crockett, R.M."

Now showing items 1-8 of 8

    • Anatomy of a post-starburst minor merger : A multi-wavelength WFC3 study of NGC 4150 

      Crockett, R.M.; Kaviraj, S.; Silk, J.I.; Whitmore, B.C.; Mutchler, M.; Bond, H.E.; O'Connell, R.W.; Balick, B.; Calzetti, D.; Carollo, C.M.; Disney, M.J.; Dopita, M.A.; Frogel, J.A.; Hall, D.N.B.; Holtzman, J. A.; Kimble, R.A.; McCarthy, P.J.; Paresce, F.; Saha, A.; Trauger, J.T.; Walker, A.R.; Windhorst, R.A.; Young, E.T.; Jeong, H.; Yi, S.K. (2011-02-01)
      We present a spatially resolved near-UV/optical study, using the Wide Field Camera 3 (WFC3) on board the Hubble Space Telescope, of NGC 4150, a sub-L , early-type galaxy (ETG) of around 6 × 10 M , which has been observed ...

    • Composite star formation histories of early-type galaxies from minor mergers : prospects for WFC3 

      Peirani, S.; Crockett, R.M.; Geen, S.; Kaviraj, S.; Silk, J.; Khochfar, S. (2010-07-01)
      The star formation history of nearby early-type galaxies is investigated via numerical modelling. Idealized hydrodynamical N-body simulations with a star formation prescription are used to study the minor merger process ...

    • Galaxy Zoo : Dust and molecular gas in early-type galaxies with prominent dust lanes 

      Kaviraj, S.; Ting, Y. S.; Bureau, M.; Shabala, S.S.; Crockett, R.M.; Silk, J.; Lintott, C.; Smith, A.; Keel, W.C.; Masters, K.L.; Schawinski, K.; Bamford, S.P. (2012-06-01)
      We explore the properties of dust and associated molecular gas in 352 nearby (0.01 <z <0.07) early-type galaxies (ETGs) with prominent dust lanes, drawn from the Sloan Digital Sky Survey (SDSS). Two-thirds of these 'dusty ...

    • Galaxy Zoo : Dust lane early-type galaxies are tracers of recent, gas-rich minor mergers 

      Shabala, S.S.; Ting, Y. S.; Kaviraj, S.; Lintott, C.; Crockett, R.M.; Silk, J.; Sarzi, M.; Schawinski, K.; Bamford, S.P.; Edmondson, E. (2012-06-01)
      We present the second of two papers concerning the origin and evolution of local early-type galaxies exhibiting dust features. We use optical and radio data to examine the nature of active galactic nucleus (AGN) activity ...

    • Minor-merger-driven growth of early-type galaxies over the last 8 billion years 

      Kaviraj, S.; Crockett, R.M.; Silk, J.; Ellis, R.S.; Yi, S.K.; O'Connell, R.W.; Windhorst, R.; Whitmore, B.C. (Cambridge University Press, 2011-09)
      We summarise recent progress in understanding the star formation activity in early-type galaxies (ETGs), using recent studies that leverage photometry in the rest-frame ultraviolet (UV) wavelengths. While classically thought ...

    • 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 ...

    • Triggered star formation in the inner filament of Centaurus A 

      Crockett, R.M.; Shabala, S.S.; Kaviraj, S.; Silk, J.; Antonuccio-Delogu, V.; Mutchler, M.; Whitmore, B.C.; O'Connell, R.W.; Rejkuba, M.; Windhorst, R.A. (2012-04-01)
      We present recent Hubble Space Telescope observations of the inner filament of Centaurus A, using the new Wide Field Camera 3 (WFC3) F225W, F657N and F814W filters. We find a young stellar population near the south-west ...