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

Understand

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.