Gamma-ray bursts, axion emission and string theory dilaton

Details Gamma-ray bursts, axion emission and string theory dilaton Gamma-ray bursts, axion emission and string theory dilaton

1999-01-14

arxiv.org/abs/astro-ph/9901184v1

Astropart.Phys. 11 (1999) 357-362

Astronomy and Astrophysics

Astrophysics

14 pages, plain Latex. To appear in Astroparticle Physics

Scientific paper

10.1016/S0927-6505(99)00005-5

The emission of axions from supernovae is an interesting possibility to account for the Gamma-Ray Bursts provided their energy can be effectively converted into electromagnetic energy elsewhere. The connection between supernova and gamma-ray bursts has been recently confirmed by the observed correlation between the burst of April 25, 1998 and the supernova SN1998bw. We argue that the axion convertion into photons can be more efficient if one considers the coupling between an intermediate scale axion and the string theory dilaton along with the inclusion of string loops. We also discuss the way dilaton dynamics may allow for a more effective energy exchange with electromagnetic radiation in the expansion process of fireballs.

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