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Cosmological Uses of Gamma-Ray Bursts

Djorgovski, S. G. and Kulkarni, S. R. and Frail, D. A. and Harrison, F. A. and Bloom, J. S. and Berger, E. and Price, P. A. and Fox, D. and Soderberg, A. M. and Sari, Re'em and Yost, S. and Mahabal, A. A. and Castro, S. M. and Goodrich, R. and Chaffee, F. (2003) Cosmological Uses of Gamma-Ray Bursts. . (Unpublished)

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Studies of the cosmic gamma-ray bursts (GRBs) and their host galaxies are starting to provide interesting or even unique new insights in observational cosmology. GRBs represent a new way of identifying a population of star-forming galaxies at cosmological redshifts. GRB hosts are broadly similar to the normal field galaxy populations at comparable redshifts and magnitudes, and indicate at most a mild luminosity evolution out to z ~ 1.5 - 2. GRB optical afterglows seen in absorption provide a powerful new probe of the ISM in dense, central regions of their host galaxies, complementary to the traditional studies using QSO absorbers. Some GRB hosts are heavily obscured, and provide a new way to select a population of cosmological sub-mm sources, and a novel constraint on the total obscured fraction of star formation over the history of the universe. Finally, detection of GRB afterglows at z > 6 may provide a unique way to probe the primordial star formation, massive IMF, early IGM, and chemical enrichment at the end of the cosmic reionization era.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Djorgovski, S. G.0000-0002-0603-3087
Kulkarni, S. R.0000-0001-5390-8563
Harrison, F. A.0000-0003-2992-8024
Bloom, J. S.0000-0002-7777-216X
Berger, E.0000-0002-9392-9681
Fox, D.0000-0002-3714-672X
Sari, Re'em0000-0002-1084-3656
Mahabal, A. A.0000-0003-2242-0244
Additional Information:We wish to thank numerous collaborators, and the staff of Palomar and W.M. Keck Observatories for their expert help during our observing runs. Our work was supported by grants from the NSF, NASA, and private donors.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Record Number:CaltechAUTHORS:20190814-095417789
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97882
Deposited By: Tony Diaz
Deposited On:14 Aug 2019 20:38
Last Modified:03 Oct 2019 21:35

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