Gamma-Ray Bursts Black hole accretion disks as a site for the vp-process

Abstract

We study proton rich nucleosynthesis in windlike outflows from gamma-ray bursts accretion disks with the aim to determine if such outflows are a site of the vp-process. The efficacy of this vp-process depends on thermodynamic and hydrodynamic factors. We discuss the importance of the entropy of the material, the outflow rate, the initial ejection point and accretion rate of the disk. In some cases the vp-process pushes the nucleosynthesis out to A~100 and produces light p-nuclei. However, even when these nuclei are not produced, neutrino induced interactions can significantly alter the abundance pattern and cannot be neglected.

9 pages, 16 figures, accepted for publication in Phys. Rev. C

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• The r-process in the neutrino-driven wind from a black-hole torus
• Nuclear astrophysics: the unfinished quest for the origin of the elements
• Neutrino Spectra from Accretion Disks: Neutrino General Relativistic Effects and the Consequences for Nucleosynthesis
• Expression of Interest for a Novel Search for CP Violation in the Neutrino Sector: DAEdALUS
• Uncertainties in $\nu$p-process nucleosynthesis from Monte Carlo variation of reaction rates
• Nucleosynthesis of Nickel-56 from Gamma-Ray Burst Accretion Disks
• Open issues in neutrino astrophysics
• Neutrinos and Heavy Element Nucleosynthesis