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Nuclear Composition of Gamma‐Ray Burst Fireballs
Open accessAbstract
We study three processes that shape the nuclear composition of gamma-ray burst (GRB) fireballs: (1) neutronization in the central engine, (2) nucleosynthesis in the fireball as it expands and cools, and (3) spallation of nuclei in subsequent internal shocks. The fireballs are found to have a neutron excess and a marginally successful nucleosynthesis. They are composed of free nucleons, α-particles, and deuterium. A robust result is the survival of a significant neutron component, which has important implications. First, as shown in previous works, neutrons can lead to observable multi-GeV neutrino emission. Second, as we show in an accompanying paper, neutrons impact the explosion dynamics at radii up to 10 17 cm and change the mechanism of the GRB afterglow emission.
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Citations
Cited by
The physics of gamma-ray bursts & relativistic jets
Kumar, P., & Zhang, B. (2015) · Physics Reports · doi:10.1016/j.physrep.2014.09.008 · Cited by 952
GAMMA-RAY BURSTS: PROGRESS, PROBLEMS & PROSPECTS
ZHANG, B., & MÉSZÁROS, P. (2004) · International Journal of Modern Physics A · doi:10.1142/s0217751x0401746x · Cited by 783
Siegel, D. M., & Metzger, B. D. (2017) · Physical Review Letters · doi:10.1103/physrevlett.119.231102 · Cited by 317
Physical and astrophysical aspects of the problem of origin of chiral asymmetry of the biosphere
Tsarev, V. A. (2009) · Physics of Particles and Nuclei · doi:10.1134/s1063779609070028 · Cited by 12
Metadata
- Authors
- Beloborodov, A. M.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2003-05-10
- Volume
- 588
- Issue
- 2
- Pages
- 931-944
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2029784035
- Cited by
- 196
- References
- 0
- FWCI
- 7.35
- Type
- journal article
- Language
- en
- Open access
- bronze
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