Browsing University of Hertfordshire by Author "Nichol, R.C."

Now showing items 1-15 of 15

    • Galaxy and Mass Assembly (GAMA): survey diagnostics and core data release 

      Driver, S. P.; Hill, D. T.; Kelvin, L. S.; Robotham, A. S. G.; Liske, J.; Norberg, P.; Baldry, I.K.; Bamford, S. P.; Hopkins, A. M.; Loveday, J.; Peacock, J.A.; Andrae, E.; Bland-Hawthorn, J.; Brough, S.; Brown, M. J. I.; Cameron, E.; Ching, J. H. Y.; Colless, M.; Conselice, C. J.; Croom, S. M.; Cross, N.J.G.; De Propris, R.; Dye, S.; Drinkwater, M. J.; Ellis, S.; Graham, Alister W.; Grootes, M. W.; Gunawardhana, M.; Jones, D. H.; van Kampen, E.; Maraston, C.; Nichol, R.C.; Parkinson, H. R.; Phillipps, S.; Pimbblet, K.; Popescu, C. C.; Prescott, M.; Roseboom, I.G.; Sadler, E.M.; Sansom, A. E.; Sharp, R.G.; Smith, Daniel; Taylor, E.; Thomas, D.; Tuffs, R. J.; Wijesinghe, D.; Dunne, L.; Frenk, C. S.; Jarvis, M.J.; Madore, B. F.; Meyer, M. J.; Seibert, M.; Staveley-Smith, L.; Sutherland, W. J.; Warren, S.J. (2011-05)
      The Galaxy and Mass Assembly (GAMA) survey has been operating since 2008 February on the 3.9-m Anglo-Australian Telescope using the AAOmega fibre-fed spectrograph facility to acquire spectra with a resolution of R approximate ...

    • Galaxy zoo 2 : Detailed morphological classifications for 304,122 galaxies from the sloan digital sky survey 

      Willett, K.W.; Lintott, C.J.; Bamford, S.P.; Masters, K.L.; Simmons, B.D.; Casteels, K.R.V.; Edmondson, E.M.; Fortson, L.F.; Kaviraj, S.; Keel, W.C.; Melvin, T.; Nichol, R.C.; Jordan Raddick, M.; Schawinski, K.; Simpson, R.J.; Skibba, R.A.; Smith, A.M.; Thomas, D. (2013-11-01)
      We present the data release for Galaxy Zoo 2 (GZ2), a citizen science project with more than 16 million morphological classifications of 304,122 galaxies drawn from the Sloan Digital Sky Survey (SDSS).Morphology is a ...

    • 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: Bulgeless galaxies with growing black holes 

      Simmons, B.; Lintott, C.; Kaviraj, S.; Schawinski, K.; Han, A.; Urry, C.M.; Moran, E.C.; Masters, K.L.; Nichol, R.C.; Willett, K.W.; Bamford, S.P. (2013-03)
      The growth of supermassive black holes appears to be driven by galaxy mergers, violent merger-free processes and/or 'secular' processes. In order to quantify the effects of secular evolution on black hole growth, we study ...

    • 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: Multimergers and the Millennium Simulation 

      Darg, D.W.; Kaviraj, S.; Lintott, C.J.; Silk, J.; Lynn, S.; Schawinski, K.; Bamford, S.; Nichol, R.C. (2011-09)
      We present a catalogue of 39 multiple mergers, found using the mergers catalogue of the Galaxy Zoo project for z <0.1, and compare them to corresponding semi-analytical galaxies from the Millennium Simulation. We estimate ...

    • 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 ...

    • Herschel -ATLAS/GAMA : Dusty early-type galaxies and passive spirals 

      Rowlands, K.; Dunne, L.; Maddox, S.; Bourne, N.; Gomez, H.L.; Kaviraj, S.; Bamford, S. P.; Brough, S.; Charlot, S.; da Cunha, E.; Driver, S. P.; Eales, S.~A.; Hopkins, A. M.; Kelvin, L.; Nichol, R.C.; Sansom, A. E.; Sharp, R.; Smith, Daniel; Temi, P.; van der Werf, P.; Baes, M.; Cava, A.; Cooray, A.; Croom, S. M.; Dariush, A.; de Zotti, G.; Dye, S.; Fritz, J.; Hopwood, R.; Ibar, E.; Ivison, R.J.; Liske, J.; Loveday, J.; Madore, B.; Norberg, P.; Popescu, C.; Rigby, E.; Robotham, A.; Rodighiero, G.; Seibert, M.; Tuffs, R. J. (2012-01)
      We present the dust properties and star formation histories of local submillimetre-selected galaxies, classified by optical morphology. Most of the galaxies are late types and very few are early types. The early-type ...

    • Herschel -ATLAS/GAMA : Dusty early-type galaxies and passive spirals 

      Rowlands, K.; Dunne, L.; Maddox, S.; Bourne, N.; Bamford, S. P.; Smith, Daniel; Dye, S.; Rigby, E.E.; Gomez, H.L.; Eales, S.A.; Kaviraj, S.; Dariush, A.; Hopwood, R.; Brough, S.; Hopkins, A. M.; Charlot, S.; da Cunha, E.; Driver, S. P.; Kelvin, L.; Robotham, A.; Nichol, R.C.; Sansom, A. E.; Popescu, C.C.; Sharp, R.; Temi, P.; van der Werf, P.; Baes, M.; Fritz, J.; Cava, A.; Cooray, A.; Croom, S. M.; de Zotti, G.; Rodighiero, G.; Ibar, E.; Ivison, R.J.; Norberg, P.; Liske, J.; Loveday, J.; Madore, B.; Seibert, M.; Tuffs, R. J. (2012)
      We present the dust properties and star-formation histories of local submillimetre-selected galaxies, classified by optical morphology. Most of the galaxies are late types and very few are early types. The early-type ...

    • Supernova simulations and strategies for the dark energy survey. 

      Bernstein, J. P.; Kessler, R.; Kuhlmann, S.; Biswas, R.; Kovacs, E.; Aldering, G.; Crane, I.; D'Andrea, C. B.; Finley, D. A.; Frieman, J. A.; Hufford, T.; Jarvis, M.J.; Kim, A. G.; Marriner, J.; Mukherjee, P.; Nichol, R.C.; Nugent, P.; Parkinson, D.; Reis, R. R. R.; Sako, M.; Spinka, H.; Sullivan, M. (2012-07-10)
      We present an analysis of supernova light curves simulated for the upcoming Dark Energy Survey (DES) supernova search. The simulations employ a code suite that generates and fits realistic light curves in order to obtain ...