Gamma-ray bursts, axion emission and string theory dilaton

Abstract

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.

14 pages, plain Latex. To appear in Astroparticle Physics

References in corpus (5)

• Discovery of the peculiar supernova 1998bw in the error box of GRB980425
• Gamma-Ray Bursts and the Fireball Model
• A `Hypernova' model for SN 1998bw associated with gamma-ray burst of 25 April 1998
• The Supernova-Gamma Ray Burst Connection
• Supernovae, Pulsars and Gamma-Ray Bursts: A Unified Picture

Cited by in corpus (6)

• Mirror World, Supersymmetric Axion and Gamma Ray Bursts
• Cosmic Gamma-ray Bursts. Lectures Presented at XXVII ITEP Winter School
• Signatures of photon and axion-like particle mixing in the gamma-ray burst jet
• Gamma-Ray Bursts and Dark Energy - Dark Matter interaction
• Weak-Scale Hidden Sector and Energy Transport in Fireball Models of Gamma-Ray Bursts
• On the production of heavy axion-like particles in the accretion disks of gamma-ray bursts