Browsing University of Hertfordshire by Author "Murray, P."

Now showing items 1-9 of 9

    • Galaxy Zoo : Building the low-mass end of the red sequence with local post-starburst galaxies 

      Wong, O.I.; Schawinski, K.; Kaviraj, S.; Lintott, C.; Darg, D.; Masters, K.L.; Nichol, R.C.; Thomas, D.; Keel, W.C.; Bamford, S.P.; Andreescu, D.; Murray, P.; Raddick, M.J.; Szalay, A.; Vandenberg, J. (2012-02-01)
      We present a study of local post-starburst galaxies (PSGs) using the photometric and spectroscopic observations from the Sloan Digital Sky Survey and the results from the Galaxy Zoo project. We find that the majority of ...

    • Galaxy zoo : The fundamentally different co-evolution of supermassive black holes and their early- and late-type host galaxies 

      Schawinski, K.; Urry, C.M.; Virani, S.; Coppi, P.; Cardamone, C.N.; Bamford, S.P.; Treister, E.; Lintott, C.J.; Kaviraj, S.; Sarzi, M.; Keel, W.C.; Masters, K.L.; Nichol, R.C.; Thomas, D.; Ross, N.P.; Andreescu, D.; Murray, P.; Raddick, M.J.; Szalay, A.S.; Vandenberg, J.; Slosar, A. (2010-01-01)
      We use data from the Sloan Digital Sky Survey and visual classifications of morphology from the Galaxy Zoo project to study black hole growth in the nearby universe (z <0.05) and to break down the active galactic nucleus ...

    • Galaxy Zoo Green Peas: discovery of a class of compact extremely star-forming galaxies 

      Cardamone, C.; Schawinski, K.; Sarzi, M.; Bamford, S.; Bennert, N.; Urry, C.M.; Lintott, C.; Keel, W.; Parejko, J.; Nichol, R.C.; Thomas, D.; Andreescu, D.; Murray, P.; Raddick, M.J.; Slosar, A.; Szalay, A.; Vandenberg, J. (2009)
      We investigate a class of rapidly growing emission line galaxies, known as 'Green Peas', first noted by volunteers in the Galaxy Zoo project because of their peculiar bright green colour and small size, unresolved in Sloan ...

    • Galaxy Zoo: a sample of blue early-type galaxies at low redshift 

      Schawinski, K.; Lintott, C.; Kaviraj, S.; Khochfar, S.; Land, K.; Thomas, D.; Bamford, S. P.; Nichol, R.C.; Sarzi, M.; Andreescu, D.; Murray, P.; Raddick, M.J.; Szalay, A.; Vandenberg, J.; Slosar, A.; Yi, S.K. (2009)
      We report the discovery of a population of nearby, blue early-type galaxies with high star formation rates (0.5 < SFR < 50 M⊙ yr−1) . They are identified by their visual morphology as provided by Galaxy Zoo for Sloan Digital ...

    • Galaxy Zoo: Hanny's Voorwerp, a quasar light echo? 

      Lintott, C.; Schawinski, K.; Keel, W.; Van Arkel, H.; Bennert, N.; Edmondson, E.; Thomas, D.; Smith, Daniel; Herbert, P.D.; Jarvis, M.J.; Virani, S.; Andreescu, D.; Bamford, S.; Land, K.; Murray, P.; Nichol, R.C.; Raddick, M.J.; Slosar, A.; Szalay, A.; Vandenberg, J. (2009)
      We report the discovery of an unusual object near the spiral galaxy IC 2497, discovered by visual inspection of the Sloan Digital Sky Survey (SDSS) as part of the Galaxy Zoo project. The object, known as Hanny's Voorwerp, ...

    • Galaxy Zoo: the fraction of merging galaxies in the SDSS and their morphologies 

      Darg, D.W.; Kaviraj, S.; Lintott, C.J.; Silk, J.; Schawinski, K.; Sarzi, M.; Bamford, S.; Proctor, R.; Andreescu, D.; Murray, P.; Nichol, R.C.; Thomas, D.; Raddick, M.J.; Szalay, A.S.; Vandenberg, J.; Slosar, A. (2010)
      We present the largest, most homogeneous catalogue of merging galaxies in the nearby Universe obtained through the Galaxy Zoo project – an interface on the World Wide Web enabling large-scale morphological classification ...

    • Galaxy Zoo: the fundamentally different co-evolution of supermassive black holes and their early- and late-type host galaxies 

      Schawinski, K.; Urry, C.M.; Virani, S.; Coppi, P.; Bamford, S.; Treister, E.; Lintott, C.; Sarzi, M.; Keel, W.; Kaviraj, S.; Cardamone, C.; Masters, K.L.; Ross, N.P.; Andreescu, D.; Murray, P.; Nichol, R.C.; Raddick, M.J.; Slosar, A.; Szalay, A.; Thomas, D.; Vandenberg, J. (2010)
      We use data from the Sloan Digital Sky Survey and visual classifications of morphology from the Galaxy Zoo project to study black hole growth in the nearby universe (z < 0.05) and to break down the active galactic nucleus ...

    • Galaxy Zoo: The properties of merging galaxies in the nearby Universe - Local environments, colours, masses, star formation rates and AGN activity 

      Darg, D.W.; Kaviraj, S.; Lintott, C.J.; Silk, J.; Schawinski, K.; Sarzi, M.; Bamford, S.; Andreescu, D.; Murray, P.; Nichol, R.C.; Thomas, D.; Raddick, M.J.; Szalay, A.S.; Vandenberg, J.; Slosar, A. (2010)
      Following the study of Darg et al., we explore the environments, optical colours, stellar masses, star formation and active galactic nucleus activity in a sample of 3003 pairs of merging galaxies drawn from the Sloan Digital ...

    • Rates and Determinants of Uptake and Use of an Internet Physical Activity and Weight Management Program in Office and Manufacturing Work Sites in England: Cohort Study 

      Ware, L.J.; Hurling, R.; Batavelijic, O.; Fairley, B.W.; Hurst, T.; Murray, P.; Rennie, K.L.; Tomkins, C.E.; Finn, A.; Cobain, M.; Pearson, D.A.; Foreyt, J.P. (2008)