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Browsing by Author "Centre for Astrophysics Research"

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  • Rauscher, T. (2014-04-01)
    Nucleosynthesis beyond Fe poses additional challenges not encountered when studying astrophysical processes involving light nuclei. Astrophysical sites and conditions are not well known for some of the processes involved. ...
  • Civano, F.; Elvis, M.; Aldcroft, T.; Fruscione, A.; Hao, H.; Lanzuisi, G.; Wright, N.J.; Brusa, M.; Salvato, M.; Bongiorno, A.; Comastri, A.; Zamorani, G.; Cappelluti, N.; Gilli, R.; Lusso, E.; Vignali, C.; Fiore, F.; Capak, P.; Scoville, N.Z.; Cisternas, M.; Kartaltepe, J.; Koekemoer, A. M.; Impey, C.D.; Trump, J.; Mainieri, V.; Miyaji, T.; Lilly, S.; Masters, D.; Puccetti, S.; Schawinski, K.; Urry, M.; Silverman, J. (2012-08-01)
    The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, Chandra program that has imaged the central 0.9 deg2 of the COSMOS field down to limiting depths of 1.9×10−16 erg cm−2 s−1 in the soft (0.5–2 keV) band, 7.3×10−16 ...
  • 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 ...
  • Brassington, Nicola; Read, Andrew M.; Ponman, T.J. (2005-07-01)
    In this paper we present the results of a 20-ks high-resolution Chandra X-ray observation of the peculiar galaxy pair NGC 3395/3396, a system at a very early stage of merging, and less evolved than the famous Antennae and ...
  • Brassington, Nicola; Ponman, T.J.; Read, Andrew M. (2007-06-01)
    From a Chandra survey of nine interacting galaxy systems the evolution of X-ray emission during the merger process has been investigated. It is found that the X-ray luminosity peaks ~300Myr before nuclear coalescence, and ...
  • J. Wilkes, Belinda; V. Lal, Dharam; M. Worrall, D.; Birkinshaw, Mark; Haas, Martin; P. Willner, S.; Antonucci, Robert; L. N. Ashby, M.; Avara, Mark; Barthel, Peter; Chini, Rolf; G Fazio, G.; Hardcastle, M.J.; Lawrence, Charles; Leipski, Christian; Ogle, Patrick; Schulz, Bernhard (2012-01-20)
    Chandra X-ray observations of the high redshift (z =1.532) radio-loud quasar 3C270.1 in 2008 February show the nucleus to have a power-law spectrum, Gamma = 1.66 +/- 0.08, typical of a radio-loud quasar, and a marginally-detected ...
  • Borucki, W.J.; Koch, D.G.; Basri, G.; Batalha, N.; Brown, T.M.; Bryson, S.T.; Caldwell, T.; Christensen-Dalsgaard, J.; Cochran, W.D.; DeVore, E.; Dunham, E.W.; Gautier, T.N.; Geary, J.C.; Gilliland, R.; Gould, A.; Howell, S.B.; Jenkins, J.M.; Latham, D.W.; Lissauer, J.J.; Marcy, G.W.; Rowe, J.; Sasselov, D.; Boss, A.; Charbonneau, D.; Ciardi, D.; Doyle, L.; Dupree, A.K.; Ford, E.B.; Fortney, J.; Holman, M.J.; Seager, S.; Steffen, J.H.; Tarter, J.; Welsh, W.F.; Allen, C.; Buchhave, L.A.; Christiansen, J.L.; Clarke, B.D.; Das, S.; Desert, J.M.; Endl, M.; Fabrycky, D.; Fressin, F.; Haas, M.; Horch, E.; Howard, A.; Isaacson, H.; Kjeldsen, H.; Kolodziejczak, J.; Kulesa, C.; Li, J.; Lucas, Philip; Machalek, P.; McCarthy, D.; MacQueen, P.; Meibom, S.; Miquel, T.; Prsa, A.; Quinn, S.N.; Quintana, E.V.; Ragozzine, D.; Sherry, W.; Shpora, A.; Tenenbaum, P.; Torres, G.; Twicken, J.D.; Van Cleve, J.; Walkowicz, L.; Witteborn, F.C.; Still, M. (2011)
    On 2011 February 1 the Kepler mission released data for 156,453 stars observed from the beginning of the science observations on 2009 May 2 through September 16. There are 1235 planetary candidates with transit-like ...
  • Battersby, C.; Bally, J.; Ginsburg, A.; Bernard, J.-P.; Brunt, C.; Fuller, G.A.; Martin, P.; Molinari, S.; Mottram, J.; Peretto, N.; Testi, L.; Thompson, Mark (2011-11-01)
    Context. Despite their profound effect on the universe, the formation of massive stars and stellar clusters remains elusive. Recent advances in observing facilities and computing power have brought us closer to understanding ...
  • Riaz, Basmah; Gizis, John E. (2007-05-20)
    We present detailed modeling of the disk around the TW Hydrae Association (TWA) brown dwarf 2MASSW J1207334 - 393254 (2M1207), using Spitzer observations from 3.6 to 24 mu m. The spectral energy distribution (SED) does not ...
  • Farouqi, K.; Kratz, K.L.; Pfeiffer, B.; Rauscher, T.; Thielemann, Friedrich-Karl; Truran, J. W. (2010-04-01)
    The astrophysical site of the r-process is still uncertain, and a full exploration of the systematics of this process in terms of its dependence on nuclear properties from stability to the neutron drip-line within realistic ...
  • Aoki, W.; Norris, J.E.; Ryan, Sean G.; Beers, T.C.; Ando, H. (2002-09)
  • Kobayashi, Chiaki; Tominaga, Nozomu; Nomoto, Ken'ichi (2011-04-01)
    We show that the recently observed elemental abundance pattern of the carbon-rich metal-poor damped Ly alpha (DLA) system is in excellent agreement with the nucleosynthesis yields of faint core-collapse supernovae of ...
  • Vonlanthen, P.; Rauscher, T.; Winteler, C.; Puy, D.; Signore, M.; Dubrovich, V. (2009-08)
    Context. Primordial molecules were formed during the Dark Ages, i.e. the time between recombination and reionization in the early Universe. They were the constituents of the first proto-stellar clouds. Standard Big Bang ...
  • Kobayashi, C. (2004-01)
    We simulate the chemodynamical evolution of a hundred elliptical galaxies using our GRAPE-SPH code, and succeed in reproducing the radial metallicity gradients and the global scaling relations such as the fundamental plane. ...
  • Kobayashi, C. (2002-07)
    I simulate the chemodynamical evolution of the Milky Way and elliptical galaxies using the GRAPE-SPH code. By reproducing the observations, I discuss the origin of elliptical galaxies
  • Kobayashi, Chiaki (American Institute of Physics, 2010)
    We predict the frequency distribution of elemental abundance ratios from Carbon to Zinc as a functions of time and location, which can be directly compared with the next generation of the galactic archeology project such ...
  • Kobayashi, Chiaki (Cambridge University Press, 2010)
    We simulate the formation and evolution of galaxies with a self-consistent 3D hydrodynamical model including star formation, supernova feedback, and chemical enrichment. Hypernova feedback plays an essential role not only ...
  • Kobayashi, Chiaki (Cambridge University Press, 2009)
    We simulate the chemodynamical evolution of the Milky Way Galaxy, including the nucleosynthesis yields of hypernovae and a new progenitor model for Type la Supernovae (SNe la). In our nucleosynthesis yields of core-collapse ...
  • Kobayashi, Chiaki; Nakasato, Naohito (2011-03-01)
    We present chemodynamical simulations of a Milky-Way-type galaxy using a self-consistent hydrodynamical code that includes supernova feedback and chemical enrichment, and predict the spatial distribution of elements from ...