In Search for a Relation with Physical Origin for GRBs

Details In Search for a Relation with Physical Origin for GRBs In Search for a Relation with Physical Origin for GRBs

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21710805b&link_type=abstract

American Astronomical Society, AAS Meeting #217, #108.05; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Gamma-ray burst observations provide a great opportunity for cosmography in high redshift. Some tight GRB correlations are already known. The relations with physical origin will have a better potential to utilize GRBs for cosmography. Ryde (2004) showed that the prompt emission spectrum is interpreted as composition of a thermal component in addition to the non-thermal one. We show here that analysing the thermal component of the GRB prompt emission leads us to a well-correlated relation. We also perform monte carlo test and show that this correlation is acceptably insensitive to our assumptions. Our correlation looks similar to Ghilanda's in quality, and provides some physical insights to Ghirlanda's relation.

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