Browsing by Subject "Galaxies -- Formation"

Browsing by Subject "Galaxies -- Formation"

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  • Few, C. G.; Courty, S.; Gibson, Brad K.; Michel-Dansac, L.; Calura, F. (Oxford University Press, 2014-11-11)
    We trace the formation and advection of several elements within a cosmological adaptive mesh refinement simulation of an L galaxy. We use nine realizations of the same initial conditions with different stellar ...

  • Pilkington, K.; Gibson, Brad K.; Calura, F.; Brooks, A. M.; Mayer, L.; Brook, C. B.; Stinson, G. S.; Thacker, Robert John, 1970-; Few, C. G.; Cunnama, D. (Wiley-Blackwell, 2011-11)
    We present an analysis of the neutral hydrogen (H I) properties of a fully cosmological hydrodynamical dwarf galaxy, run with varying simulation parameters. As reported by Governato et al., the high-resolution, high star ...

  • Dressler, Alan; Henry, Alaina; Martin, Crystal L.; Sawicki, Marcin, 1969-; McCarthy, Patrick; Villaneuva, Edward (American Astronomical SocietyIOP Publishing, 2015-06-10)
    We report the first direct and robust measurement of the faint-end slope of the Ly[alpha] emitter (LAE) luminosity function (LF) at z = 5.7. Candidate LAEs from a low-spectral-resolution blind search with IMACS on ...

  • Dressler, Alan; Martin, Crystal L.; Henry, Alaina; Sawicki, Marcin, 1969-; McCarthy, Patrick (American Astronomical Society, 2011-10-20)
    We report results of an unprecedentedly deep, blind search for Ly[alpha] emitters (LAEs) at z = 5.7 using the Inamori-Magellan Areal Camera & Spectrograph (IMACS), with the goal of identifying missing sources of reionization ...

  • Iwata, I.; Ohta, K.; Tamura, N.; Akiyama, M.; Aoki, K.; Ando, M.; Kiuchi, G.; Sawicki, Marcin, 1969- (Royal Astronomical SocietyOxford University Press, 2007)
    We report the ultraviolet luminosity function (UVLF) of Lyman break galaxies at z∼5 derived from a deep and wide survey using the prime focus camera of the 8.2 m Subaru telescope (Suprime-Cam). Target fields consist of two ...

  • Razoumov, Alexei O.; Laursen, Peter; Sommer-Larsen, Jesper (American Astronomical Society, 2009-09-01)
    There is no abstract available for this article.

  • Sawicki, Marcin, 1969-; Henry, Alaina L.; Martin, Crystal L.; Dressler, Alan; McCarthy, Patrick (American Astronomical SocietyIOP Publishing, 2012-01-10)
    Using new Keck DEIMOS spectroscopy, we examine the origin of the steep number counts of ultra-faint emission-line galaxies recently reported by Dressler et al. We confirm six Ly[alpha] emitters (LAEs), three of which have ...

  • West, Michael J.; Cote, Patrick; Marzke, Ronald O. (American Astronomical Society, 1998-07)
    We examine the formation of giant elliptical galaxies using their globular cluster (GC) systems as probes of their evolutionary history. The bimodal distributions of GC metallicities in such galaxies are often cited as ...

  • Pisano, D. J.; Barnes, David G.; Staveley-Smith, Lister; Gibson, Brad K.; Kilborn, Virginia A.; Freeman, Ken C. (IOP Publishing Limited, 2011-12)
    We have conducted an H I 21 cm emission-line survey of six loose groups of galaxies chosen to be analogs to the Local Group. The survey was conducted using the Parkes multibeam instrument and the Australia Telescope Compact ...

  • Gibson, Brad K.; Maccio, A. V.; Stinson, G.; Brook, C. B.; Wadsley, J.; Couchman, H. M. P.; Shen, S.; Quinn, T. (American Astronomical SocietyIOP Publishing, 2012-01-01)
    A clear prediction of the cold dark matter (CDM) model is the existence of cuspy dark matter halo density profiles on all mass scales. This is not in agreement with the observed rotation curves of spiral galaxies, challenging ...

  • Snaith, O. N.; Gibson, Brad K.; Brook, C. B.; Knebe, A.; Thacker, Robert John, 1970-; Quinn, T. R.; Governato, F.; Tissera, P. B. (Oxford University Press, 2012-09)
    We examine the properties and evolution of a simulated polar disc galaxy. This galaxy is composed of two orthogonal discs, one of which contains old stars (old stellar disc) and the other both younger stars and cold gas ...

  • Gibson, Brad K.; Brook, C. B.; Stinson, G.; Roskar, R.; Wadsley, J.; Quinn, T. (Oxford University Press, 2012-01)
    Within a fully cosmological hydrodynamical simulation, we form a galaxy which rotates at 140 km s[superscript −1], and it is characterized by two loose spiral arms and a bar, indicative of a Hubble-type SBc/d galaxy. We ...

  • Richardson, Mark L. A.; Scannapieco, Evan; Thacker, Robert John, 1970- (American Astronomical Society, 2013-07-10)
    In the early universe, substantial relative “stream” velocities between the gas and dark matter arise due to radiation pressure and persist after recombination. To assess the impact of these velocities on high-redshift ...

  • Savoy, Jonathan; Sawicki, Marcin, 1969-; Thompson, David; Sato, Taro (American Astronomical SocietyIOP Publishing, 2011-08-20)
    We investigate the luminosity-dependent clustering of rest-frame UV-selected galaxies at z ∼ 4, 3, 2.2, and 1.7 in the Keck Deep Fields, which are complete to R = 27 and cover 169 arcmin[superscript 2]. We find that at z ...

  • Razoumov, Alexei O.; Laursen, Peter; Sommer-Larsen, Jesper (American Astronomical Society and IOP Publishing, 2009-05-01)
    A numerical code for solving various Ly[alpha] radiative transfer (RT) problems is presented. The code is suitable for an arbitrary, three-dimensional distribution of Ly[alpha] emissivity, gas temperature, density, and ...

  • Kajino, Hiroki; Ohta, Kouji; Iwata, Ikuru; Yabe, Kiyoto; Yuma, Suraphong; Akiyama, Masayuki; Tamura, Naoyuki; Aoki, Kentaro; Sawicki, Marcin, 1969- (American Astronomical Society, 2009-10-10)
    We present results of optical spectroscopic observations of candidates of Lyman break galaxies (LBGs) at z ∼ 5 in the region, including the GOODS-N and the J0053+1234 regions by using Gemini Multi-Object Spectrograph North ...

  • Brook, C. B.; Stinson, G.; Gibson, Brad K.; Shen, S.; Maccio, A. V.; Obreja, A.; Wadsley, J.; Quinn, T. (Oxford University Press, 2014-10-01)
    Using cosmological galaxy formation simulations from the MaGICC (Making Galaxies in a Cosmological Context) project, spanning stellar mass from ∼107 to 3 × 1010 M, we trace the ...

  • Obreja, A.; Brook, C. B.; Stinson, G.; Dominguez-Tenreiro, R.; Gibson, Brad K.; Silva, L.; Granato, G. L. (Oxford University Press, 2014-08-01)
    Using cosmological galaxy simulations from the MaGICC project, we study the evolution of the stellar masses, star formation rates and gas-phase abundances of star-forming galaxies. We derive the stellar masses and star ...

  • Arcila-Osejo, Liz Maria (Halifax, N.S. : Saint Mary's University, 2018)
    We build a K-selected catalog of z ∼ 1.6 gzKs galaxies in the Deep and Wide fields of the Canada-France-Hawaii Legacy Survey, with a final effective area of 27.6 deg2. This catalog allows us to recover ...

  • Pilkington, K.; Few, C. G.; Gibson, Brad K.; Calura, F.; Michel-Dansac, L.; Thacker, Robert John, 1970-; Molla, M.; Matteucci, F.; Rahimi, A.; Kawata, D. (EDP Sciences, 2012-04)
    Aims. We examine radial and vertical metallicity gradients using a suite of disk galaxy hydrodynamical simulations, supplemented with two classic chemical evolution approaches. We determine the rate of change of gradient ...