Accreting isolated neutron stars

Details Accreting isolated neutron stars Accreting isolated neutron stars

2006-12-22

arxiv.org/abs/astro-ph/0612685v1

Astronomy and Astrophysics

Astrophysics

Proceedings of the 363. WE-Heraeus Seminar on: Neutron Stars and Pulsars (Posters and contributed talks) Physikzentrum Bad Hon

Scientific paper

Accretion of interstellar material by a magnetized, slowly rotating isolated neutron star is discussed. We show that the average persistent X-ray luminosity of these objects is unlikely to exceed 4x10^26 erg/s. They can also appear as X-ray bursters with the burst duration of ~30 minutes and repetition time of \~10^5 yr. This indicates that the number of the accreting isolated neutron stars which could be observed with recent X-ray missions is a few orders of magnitude smaller than that previously estimated. Our findings argue against models in which the magnetic field of neutron stars is assumed to decay exponentially on a time scale shorter than 500 Myr.

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