Browsing by Author "Keel, W.C."

Now showing items 1-7 of 7

    • Chandra observations of Galaxy Zoo mergers : Frequency of binary active nuclei in massive mergers 

      Teng, S.H.; Schawinski, K.; Urry, C.M.; Bonning, E.W.; Simmons, B.D.; Darg, D.W.; Kaviraj, S.; Lintott, C.J.; Oh, K.; Cardamone, C.N.; Keel, W.C.; Treister, E. (2012-07-10)
      We present the results from a Chandra pilot study of 12 massive galaxy mergers selected from Galaxy Zoo. The sample includes major mergers down to a host galaxy mass of 1011 M ☉ that already have optical active galactic ...

    • 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 : 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 : 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 ...

    • Probing quasar shutdown timescales with Hanny's Voorwerp 

      Evans, D.A.; Schawinski, K.; Virani, S.; Urry, C.M.; Keel, W.C.; Natarajan, P.; Lintott, C.J.; Manning, A.; Coppi, P.; Kaviraj, S.; Bamford, S.P.; Józsa, G.I.G.; Garrett, M.; Van Arkel, H.; Gay, P.; Fortson, L. (American Institute of Physics (AIP), 2012)
      Galaxy formation is significantly modulated by energy output from supermassive black holes at the centers of galaxies which grow in highly efficient luminous quasar phases. The timescale on which black holes transition ...

    • The sudden death of the nearest quasar 

      Schawinski, K.; Virani, S.; Urry, C.M.; Natarajan, P.; Coppi, P.; Evans, D.A.; Keel, W.C.; Manning, A.; Lintott, C.J.; Kaviraj, S.; Bamford, S.P.; Józsa, G.I.G.; Garrett, M.; Van Arkel, H.; Gay, P.; Fortson, L. (2010-11-20)
      Galaxy formation is significantly modulated by energy output from supermassive black holes at the centers of galaxies which grow in highly efficient luminous quasar phases. The timescale on which black holes transition ...