Browsing FAS Scholarly Articles by Keyword "galaxies: formation"

Now showing items 1-12 of 12

    • Evidence for a direct collapse black hole in the Lyman α source CR7 

      Smith, Aaron; Bromm, Volker; Loeb, Abraham (Oxford University Press (OUP), 2016)
      Throughout the epoch of reionization the most luminous Ly{\alpha} emitters are capable of ionizing their own local bubbles. The CR7 galaxy at z≈6.6 stands out for its combination of exceptionally bright Ly{\alpha} and HeII ...

    • Galactic Angular Momentum in the Illustris Simulation: Feedback and the Hubble Sequence 

      Genel, Shy; Fall, S. Michael; Hernquist, Lars Eric; Vogelsberger, Mark; Snyder, Gregory F.; Rodriguez-Gomez, Vicente; Sijacki, Debora; Springel, Volker (IOP Publishing, 2015)
      We study the stellar angular momentum of thousands of galaxies in the Illustris cosmological simulation, which captures gravitational and gas dynamics within galaxies, as well as feedback from stars and black holes. We ...

    • Lyman α Radiation Hydrodynamics of Galactic Winds Before Cosmic Reionization 

      Smith, Aaron; Bromm, Volker; Loeb, Abraham (Oxford University Press (OUP), 2016)
      The dynamical impact of Lyman-alpha (Ly{\alpha}) radiation pressure on galaxy formation depends on the rate and duration of momentum transfer between Ly{\alpha} photons and neutral hydrogen gas. Although photon trapping ...

    • Mapping galaxy encounters in numerical simulations: the spatial extent of induced star formation 

      Moreno, J.; Torrey, P; Ellison, S. L.; Patton, D. R.; Bluck, A. F. L.; Bansal, G.; Hernquist, Lars Eric (Oxford University Press (OUP), 2015)
      We employ a suite of 75 simulations of galaxies in idealized major mergers (stellar mass ratio ∼2.5:1), with a wide range of orbital parameters, to investigate the spatial extent of interaction-induced star formation. ...

    • Modeling the Dust Properties of z ~ 6 Quasars with ART2—All-Wavelength Radiative Transfer with Adaptive Refinement Tree 

      Li, Yuexing; Hopkins, Philip F.; Hernquist, Lars Eric; Finkbeiner, Douglas; Cox, Thomas J.; Springel, Volker; Jiang, Linhua; Fan, Xiaohui; Yoshida, Naoki (IOP Publishing, 2008)
      The detection of large quantities of dust in z ~ 6 quasars by infrared and radio surveys presents puzzles for the formation and evolution of dust in these early systems. Previously, Li et al. showed that luminous quasars ...

    • Modelling galactic conformity with the colour–halo age relation in the Illustris simulation 

      Bray, Aaron; Pillepich, Annalisa; Sales, Laura V.; Zhu, Emily Chengxi; Genel, Shy; Rodriguez-Gomez, Vicente; Torrey, Paul; Nelson, Dylan; Vogelsberger, Mark; Springel, Volker; Eisenstein, Daniel James; Hernquist, Lars Eric (Oxford University Press (OUP), 2015)
      Comparisons between observational surveys and galaxy formation models find that dark matter haloes’ mass can largely explain their galaxies’ stellar mass. However, it remains uncertain whether additional environmental ...

    • Resonant H – Photodetachment: Enhanced Photodestruction and Consequences for Radiative Feedback 

      Miyake, S.; Stancil, P. C.; Sadeghpour, Hossein R.; Dalgarno, Alexander; McLaughlin, B. M.; Forrey, R. C. (IOP Publishing, 2010)
      The hydrogen negative ion plays a crucial role in the formation of hydrogen molecules in the early universe. Cooling through excitation of \(H_2\) drives the formation of the first cosmological objects. The \(H_2\) molecules ...

    • SDSS J103913.70+533029.7: A Super Star Cluster in the Outskirts of a Galaxy Merger 

      Knapp, Gillian R.; Tremonti, Christy A.; Rockosi, Constance M.; Schlegel, David J.; Yanny, Brian; Beers, Timothy C.; Allende Prieto, Carlos; Wilhelm, Ron; Lupton, Robert H.; Gunn, James E.; Niederste-Ostholt, Martin; Schneider, Donald P.; Covey, Kevin; Seth, Anil; Ivezic, Zeljko; Eisenstein, Daniel J.; Helmboldt, Joe; Finkbeiner, Douglas; Padmanabhan, Nikhil; Kleinman, Scot J.; Long, Dan; Snedden, Stephanie A.; Nitta, Atsuko; Harvanek, Michael; Krzesinski, Jurek; Brewington, Howard J.; Barentine, John C.; Newman, Peter R.; Nielsen, Jr., Eric H.; Fukugita, Masataka; Brinkmann, J. (IOP Publishing, 2006)
      We describe the serendipitous discovery in the spectroscopic data of the Sloan Digital Sky Survey of a starlike object, SDSS J103913.70+533029.7, at a heliocentric radial velocity of +1012 km s-1. Its proximity in position ...

    • SPT-CL J0205–5829: A z = 1.32 Evolved Massive Galaxy Cluster in the South Pole Telescope Sunyaev-Zel'dovich Effect Survey 

      Stalder, Brian A; Ruel, Jonathan; Šuhada, R.; Brodwin, M.; Aird, K. A.; Andersson, K.; Armstrong, R.; Ashby, Matthew L N; Bautz, M.; Bayliss, Matthew; Bazin, G.; Benson, B. A.; Bleem, L. E.; Carlstrom, J. E.; Chang, C. L.; Cho, H. M.; Clocchiatti, A.; Crawford, T. M.; Crites, A. T.; de Haan, T.; Desai, S.; Dobbs, M. A.; Dudley, J. P.; Foley, R. J.; Forman, William R.; George, E. M.; Gettings, D.; Gladders, M. D.; Gonzalez, A. H.; Halverson, N. W.; Harrington, N. L.; High, F. W.; Holder, G. P.; Holzapfel, W. L.; Hoover, S.; Hrubes, J. D.; Jones, C.; Joy, M.; Keisler, R.; Knox, L.; Lee, A. T.; Leitch, E. M.; Liu, J.; Lueker, M.; Luong-Van, D.; Mantz, A.; Marrone, D. P.; McDonald, M.; McMahon, J. J.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Mohr, J. J.; Montroy, T. E.; Murray, Stephen S.; Natoli, T.; Nurgaliev, Daniyar Rashidovich; Padin, S.; Plagge, T.; Pryke, C.; Reichardt, C. L.; Rest, A.; Ruhl, J. E.; Saliwanchik, B. R.; Saro, A.; Sayre, J. T.; Schaffer, K. K.; Shaw, L.; Shirokoff, E.; Song, J.; Spieler, H. G.; Stanford, S. A.; Staniszewski, Z.; Stark, Antony A.; Story, K.; Stubbs, Christopher William; van Engelen, A.; Vanderlinde, K.; Vieira, J. D.; Vikhlinin, Alexey A.; Williamson, R.; Zahn, O.; Zenteno, A. (American Astronomical Society / IOP Publishing, 2013)
      The galaxy cluster SPT-CL J0205–5829 currently has the highest spectroscopically confirmed redshift, z = 1.322, in the South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey. XMM-Newton observations measure a core-excluded ...

    • The stellar mass assembly of galaxies in the Illustris simulation: growth by mergers and the spatial distribution of accreted stars 

      Rodriguez-Gomez, Vicente; Pillepich, Annalisa; Sales, Laura V.; Genel, Shy; Vogelsberger, Mark; Zhu, Qirong; Wellons, Sarah; Nelson, Dylan; Torrey, Paul; Springel, Volker; Ma, Chung-Pei; Hernquist, Lars Eric (Oxford University Press (OUP), 2016)
      We use the Illustris simulation to study the relative contributions of in situ star formation and stellar accretion to the build-up of galaxies over an unprecedentedly wide range of masses (M* = 109-1012 M⊙), galaxy types, ...

    • Ultradiffuse galaxies: the high-spin tail of the abundant dwarf galaxy population 

      Amorisco, Nicola C.; Loeb, Abraham (Oxford University Press (OUP), 2016)
      Recent observations have revealed the existence of an abundant population of faint, low surface brightness (SB) galaxies, which appear to be numerous and ubiquitous in nearby galaxy clusters, including the Virgo, Coma and ...

    • Zooming in on accretion – I. The structure of halo gas 

      Nelson, Dylan; Genel, Shy; Pillepich, Annalisa; Vogelsberger, Mark; Springel, Volker; Hernquist, Lars Eric (Oxford University Press (OUP), 2016)
      We study the properties of gas in and around 1012 M⊙ haloes at z = 2 using a suite of high-resolution cosmological hydrodynamic ‘zoom’ simulations. We quantify the thermal and dynamical structure of these gaseous reservoirs ...