Matthew D. Kistler et al 2009 ApJ 705 L104 doi:10.1088/0004-637X/705/2/L104
THE STAR FORMATION RATE IN THE REIONIZATION ERA AS INDICATED BY GAMMA-RAY BURSTS
FREE ISSUEMatthew D. Kistler1,2, Hasan Yüksel3, John F. Beacom1,2,4, Andrew M. Hopkins5 and J. Stuart B. Wyithe6
Show affiliationsHigh-redshift gamma-ray bursts (GRBs) offer an extraordinary opportunity to study aspects of the early universe, including the cosmic star formation rate (SFR). Motivated by the two recent highest-z GRBs, GRB 080913 at z 
6.7 and GRB 090423 at z 8.1, and more than four years of Swift observations, we first confirm that the GRB rate does not trace the SFR in an unbiased way. Correcting for this, we find that the implied SFR to beyond z = 8 is consistent with Lyman Break Galaxy-based measurements after accounting for unseen galaxies at the faint end of the UV luminosity function. We show that this provides support for the integrated star formation in the range 6 
z 8 to have been alone sufficient to reionize the universe.
- Keywords
- PACS
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98.70.Rz &ggr;-ray sources; &ggr;-ray bursts
98.62.Py Distances, redshifts, radial velocities; spatial distribution of galaxies
98.62.Nx Jets and bursts; galactic winds and fountains
98.62.Qz Magnitudes and colors; luminosities
98.62.Ai Origin, formation, evolution, age, and star formation
- Subjects
- Dates
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Issue 2 (2009 November 10)
Received 2009 June 9, accepted for publication 2009 September 17
Published 2009 October 20
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The Star Formation Rate in the Reionization Era as Indicated by Gamma-Ray Bursts
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