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Tracing early structure formation with massive starburst galaxies and their implications for reionization

Nagamine, Kentaro and Cen, Renyue and Furlanetto, Steven R. and Hernquist, Lars and Night, Christopher and Ostriker, Jeremiah P. and Ouchi, Masami (2006) Tracing early structure formation with massive starburst galaxies and their implications for reionization. New Astronomy Reviews, 50 (1-3). pp. 29-34. ISSN 1387-6473. https://resolver.caltech.edu/CaltechAUTHORS:20110728-091651280

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Abstract

Cosmological hydrodynamic simulations have significantly improved over the past several years, and we have already shown that the observed properties of Lyman-break galaxies (LBGs) at z = 3 can be explained well by the massive galaxies in the simulations. Here, we extend our study to z = 6 and show that we obtain good agreement for the LBGs at the bright-end of the luminosity function (LF). Our simulations also suggest that the cosmic star formation rate density has a peak at z = 5–6, and that the current LBG surveys at z = 6 are missing a significant number of faint galaxies that are dimmer than the current magnitude limit. Together, our results suggest that the universe could be reionized at z = 6 by the Pop II stars in ordinary galaxies. We also estimate the LF of Lyman-α emitters (LAEs) at z = 6 by relating the star formation rate in the simulation to the Lyα luminosity. We find that the simulated LAE LFs agree with the observed data provided that the net escape fraction of Lyα photon is f_(Lyα) ≤ 0.1. We investigate two possible scenarios for this effect: (1) all sources in the simulation are uniformly dimmer by a factor of 10 through attenuation, and (2) one out of 10 LAEs randomly lights up at a given moment. We show that the correlation strength of the LAE spatial distribution can possibly distinguish the two scenarios.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.newar.2005.11.002DOIArticle
http://www.sciencedirect.com/science/article/pii/S1387647305001466PublisherArticle
ORCID:
AuthorORCID
Furlanetto, Steven R.0000-0002-0658-1243
Hernquist, Lars0000-0001-6950-1629
Ouchi, Masami0000-0002-1049-6658
Additional Information:© 2005 Elsevier B.V. Available online 13 December 2005.
Subject Keywords:Cosmology; Theory; Galaxy formation; Star formation
Issue or Number:1-3
Record Number:CaltechAUTHORS:20110728-091651280
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110728-091651280
Official Citation:Kentaro Nagamine, Renyue Cen, Steven R. Furlanetto, Lars Hernquist, Christopher Night, Jeremiah P. Ostriker, Masami Ouchi, Tracing early structure formation with massive starburst galaxies and their implications for reionization, New Astronomy Reviews, Volume 50, Issues 1-3, First Light and Reionization: Theoretical Study and Experimental Detection of First Luminous Sources in the Universe, March 2006, Pages 29-34, ISSN 1387-6473, DOI: 10.1016/j.newar.2005.11.002. (http://www.sciencedirect.com/science/article/pii/S1387647305001466)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:24576
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:28 Jul 2011 17:12
Last Modified:06 Nov 2019 03:57

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