Details

Autor(en) / Beteiligte

• Kistler, Matthew D
• Yüksel, Hasan
• Beacom, John F
• Hopkins, Andrew M
• Wyithe, J. Stuart B

Titel

The Star Formation Rate in the Reionization Era as Indicated by Gamma-Ray Bursts

Ist Teil von

• The Astrophysical journal, 2009-11, Vol.705 (2), p.L104-L108

Ort / Verlag

United States: IOP Publishing

Erscheinungsjahr

2009

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• High-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 approx = 6.7 and GRB 090423 at z approx = 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 approx< z approx< 8 to have been alone sufficient to reionize the universe.