Light Element Synthesis in High Entropy Relativistic Flows Associated with Gamma Ray Bursts

Details Light Element Synthesis in High Entropy Relativistic Flows Associated with Gamma Ray Bursts Light Element Synthesis in High Entropy Relativistic Flows Associated with Gamma Ray Bursts

2002-05-03

arxiv.org/abs/astro-ph/0205056v1

Astrophys.J. 580 (2002) 368-373

Astronomy and Astrophysics

Astrophysics

14 pages 3 figures

Scientific paper

10.1086/342838

We calculate and discuss the light element freeze-out nucleosynthesis in high entropy winds and fireballs for broad ranges of entropy-per-baryon, dynamic timescales characterizing relativistic expansion, and neutron-to-proton ratios. With conditions characteristic of Gamma Ray Bursts (GRBs) we find that deuterium production can be prodigious, with final abundance values 2H/H approximately 2%, depending on the fireball isospin, late time dynamics, and the effects of neutron decoupling- induced high energy non-thermal nuclear reactions. This implies that there potentially could be detectable local enhancements in the deuterium abundance associated with GRB events.

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