SIMBAD references

2005ApJ...628..914S - Astrophys. J., 628, 914-922 (2005/August-1)

Alfven wave-driven proto-neutron star winds and r-process nucleosynthesis.

SUZUKI T.K. and NAGATAKI S.

Abstract (from CDS):

We propose magnetic proto-neutron star (PNS) winds driven by Alfvén waves, as well as the neutrino heating, as an appropriate site for r-process nucleosynthesis. Alfvén waves excited by surface motions of a PNS propagate outwardly, and they heat and accelerate the wind by dissipation. Compared with the wind purely driven by neutrino heating, a larger entropy per baryon and shorter dynamical timescale are achieved, which favors the r-process. We study reasonable cases in which the wave amplitude is 10% of the Alfvén speed at the surface to find that a PNS with surface field strength ≳5x1014 G gives suitable wind properties for the r-process, provided that the dissipation length of the wave is at most ∼10 times the PNS radius. We also compare properties of transcritical and subcritical winds in light of the r-process. We finally discuss possibilities of detections of γ-rays from radioactive nuclei and absorption lines due to Ba in supernova remnants that possess magnetars.

Abstract Copyright:

Journal keyword(s): Magnetic Fields - Nuclear Reactions, Nucleosynthesis, Abundances - Plasmas - Stars: Neutron - Stars: Supernovae: General - Waves

Simbad objects: 3

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2021.03.05-21:25:17

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