Browsing Faculty of Arts and Sciences by Keyword "cosmology: theory"

Now showing items 1-12 of 12

    • CEMP stars: possible hosts to carbon planets in the early Universe 

      Mashian, Natalie; Loeb, Abraham (Oxford University Press (OUP), 2016)
      We explore the possibility of planet formation in the carbon-rich protoplanetary disks of carbon-enhanced metal-poor (CEMP) stars, possible relics of the early Universe. The chemically anomalous abundance patterns ([C/Fe] ...

    • Cosmological Recombination of Lithium and Its Effect on the Microwave Background Anisotropies 

      Stancil, Phillip C.; Loeb, Abraham; Zaldarriaga, Matias; Dalgarno, Alexander; Lepp, Stephen (IOP Publishing, 2002)
      The cosmological recombination history of lithium, produced during big bang nucleosynthesis, is presented using updated chemistry and cosmological parameters consistent with recent cosmic microwave background (CMB) ...

    • Delay Spectrum with Phase-Tracking Arrays: Extracting the HI power spectrum from the Epoch of Reionization 

      Paul, Sourabh; Sethi, Shiv K.; Morales, Miguel F.; Dwarkanath, K. S.; Shankar, N. Udaya; Subrahmanyan, Ravi; Barry, N.; Beardsley, A. P.; Bowman, Judd D.; Briggs, F.; Carroll, P.; de Oliveira-Costa, A.; Dillon, Joshua S.; Ewall-Wice, A.; Feng, L.; Greenhill, Lincoln Jared; Gaensler, B. M.; Hazelton, B. J.; Hewitt, J. N.; Hurley-Walker, N.; Jacobs, D. J.; Kim, Han-Seek; Kittiwisit, P.; Lenc, E.; Line, J.; Loeb, Abraham; McKinley, B.; Mitchell, D. A.; Neben, A. R.; Offringa, A. R.; Pindor, B.; Pober, J. C.; Procopio, P.; Riding, J.; Sullivan, I. S.; Tegmark, M.; Thyagarajan, Nithyanandan; Tingay, S. J.; Trott, C. M.; Wayth, R. B.; Webster, R. L.; Wyithe, J. S. B.; Cappallo, Roger; Johnston-Hollitt, M.; Kaplan, D. L.; Lonsdale, C. J.; McWhirter, S. R.; Morgan, E.; Oberoi, D.; Ord, S. M.; Prabu, T.; Srivani, K. S.; Williams, A.; Williams, C. L. (American Astronomical Society, 2016)
      The Detection of redshifted 21 cm emission from the epoch of reionization (EoR) is a challenging task owing to strong foregrounds that dominate the signal. In this paper, we propose a general method, based on the delay ...

    • 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 ...

    • Galaxy Clustering in Early Sloan Digital Sky Survey Redshift Data 

      Zehavi, Idit; Blanton, Michael R.; Frieman, Joshua A.; Weinberg, David H.; Mo, Houjun J.; Strauss, Michael A.; Anderson, Scott F.; Annis, James; Bahcall, Neta A.; Bernardi, Mariangela; Briggs, John W.; Brinkmann, Jon; Burles, Scott; Carey, Larry; Castander, Francisco J.; Connolly, Andrew J.; Csabai, Istvan; Dalcanton, Julianne J.; Dodelson, Scott; Doi, Mamoru; Eisenstein, Daniel James; Evans, Michael L.; Finkbeiner, Douglas; Friedman, Scott; Fukugita, Masataka; Gunn, James E.; Hennessy, Greg S.; Hindsley, Robert B.; Ivezic, Zeljko; Kent, Stephen; Knapp, Gillian R.; Kron, Richard; Kunszt, Peter; Lamb, Donald Q.; Leger, R. French; Long, Daniel C.; Loveday, Jon; Lupton, Robert H.; McKay, Timothy; Meiksin, Avery; Merrelli, Aronne; Munn, Jeffrey A.; Narayanan, Vijay; Newcomb, Matt; Nichol, Robert C.; Owen, Russell; Peoples, John; Pope, Adrian; Rockosi, Constance M.; Schlegel, David; Schneider, Donald P.; Scoccimarro, Roman; Sheth, Ravi K.; Siegmund, Walter; Smee, Stephen; Snir, Yehuda; Stebbins, Albert; Stoughton, Christopher; SubbaRao, Mark; Szalay, Alexander S.; Szapudi, Istvan; Tegmark, Max; Tucker, Douglas L.; Uomoto, Alan; Vanden Berk, Dan; Vogeley, Michael S.; Waddell, Patrick; Yanny, Brian; York, Donald G.; undefined, undefined (IOP Publishing, 2002)
      We present the first measurements of clustering in the Sloan Digital Sky Survey (SDSS) galaxy redshift survey. Our sample consists of 29,300 galaxies with redshifts 5700 km s-1 ≤ cz ≤ 39,000 km s-1, distributed in several ...

    • 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 ...

    • 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 ...

    • Moving mesh cosmology: the hydrodynamics of galaxy formation 

      Sijacki, Debora; Vogelsberger, Mark; Kere?, Du?an; Springel, Volker; Hernquist, Lars Eric (Oxford University Press (OUP), 2012)
      We present a detailed comparison between the well-known smoothed particle hydrodynamics (SPH) code gadget and the new moving-mesh code arepo on a number of hydrodynamical test problems. Through a variety of numerical ...

    • A moving mesh unstaggered constrained transport scheme for magnetohydrodynamics 

      Mocz, Philip; Pakmor, Rüdiger; Springel, Volker; Vogelsberger, Mark; Marinacci, Federico; Hernquist, Lars Eric (Oxford University Press (OUP), 2016)
      We present a constrained transport (CT) algorithm for solving the 3D ideal magnetohydrodynamic (MHD) equations on a moving mesh, which maintains the divergence-free condition on the magnetic field to machine-precision. Our ...

    • 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 ...

    • 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, ...

    • 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 ...