The statistics of slow interstellar accretion onto neutron stars

Physics

Scientific paper

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Gamma Ray Bursts, Interstellar Gas, Neutron Stars, Stellar Mass Accretion, Astronomical Models, Milky Way Galaxy, Monte Carlo Method, Statistical Analysis, Stellar Physics

Scientific paper

Monte Carlo calculations of neutron star orbits in the Galaxy are performed adopting the birth distribution of the slow moving radio pulsar population found by Narayan and Ostriker. A smooth model of the interstellar medium is incorporated and the distribution of accreted masses onto neutron stars in the solar neighborhood is calculated. Appendices describing a general analytic approach to the accretion problem are included. This agrees very well with the Monte Carlo results and is valid under more general assumption about the interstellar matter distribution and birth properties of neutron stars. These results may be used to test theories of high-energy sources which invoke interstellar accretion. In particular the implications for a model of gamma-ray bursts based on electron capture-induced starquakes are explored.

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