Nuclear in-medium effects and neutrino emissivity of neutron stars

Details Nuclear in-medium effects and neutrino emissivity of neutron stars Nuclear in-medium effects and neutrino emissivity of neutron stars

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.273..596b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 273, Issue 3, pp. 596-602.

Astronomy and Astrophysics

Astronomy

12

Dense Matter, Radiation Mechanisms: Nonthermal, Stars: Neutron

Scientific paper

The influence of nuclear in-medium effects on the neutrino emissivity of neutron star matter is studied within a thermodynamic T-matrix approach. It is shown that, depending on temperature, density and total momentum, the in-medium scattering cross-section of the nucleons can be significantly altered compared to the free-scattering cross-section. In particular, as a result of the blocking of intermediate states the effective nucleon-nucleon cross-section is considerably enhanced for transferred momenta of about twice the Fermi momentum, and diminished at low momentum transfers. The impact of these in-medium effects on the neutrino emissivity of the modified Urca and the neutron-neutron bremsstrahlung processes is considered. The modifications of the neutrino thermal conductivity and the neutrino mean free path are also discussed.

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