Convective instability in proto-neutron stars

Details Convective instability in proto-neutron stars Convective instability in proto-neutron stars

2000-07-06

arxiv.org/abs/astro-ph/0007069v1

Astrophys.J. 543 (2000) 1001-1006

Astronomy and Astrophysics

Astrophysics

17 pages, 3 figures. Accepted for publication in Astrophysical Journal

Scientific paper

10.1086/317163

The linear hydrodynamic stability of proto-neutron stars (PNSs) is considered taking into account dissipative processes such as neutrino transport and viscosity. We obtain the general instability criteria which differ essentially from the well-known Ledoux criterion used in previous studies. We apply the criteria to evolutive models of PNSs that, in general, can be subject to the various known regimes such as neutron fingers and convective instabilities. Our results indicate that the fingers instability arises in a more extended region of the stellar volume and lasts a longer time than expected.

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