On the accretion efficiency of neutron stars in long--period binaries

Details On the accretion efficiency of neutron stars in long--period binaries On the accretion efficiency of neutron stars in long--period binaries

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aspc..261..531r&link_type=abstract

The Physics of Cataclysmic Variables and Related Objects, ASP Conference Proceedings, Vol. 261. Edited by B. T. Gänsicke, K. Beu

Physics

3

Scientific paper

From the observed properties of the pulsar binary systems with long orbital periods (Porb >~100d) and the fact that obviously no X--ray outburst from the corresponding progenitor population of long--period X--ray transients has been observed so far, we derive a lower limit of >~1500yr for the duration of the quiescence of the accretion disc in such systems. As has been argued by Ritter & King (2001) this implies that the accretion efficiency of neutron stars in long--period X--ray transients must be extremely low, in fact too low to allow for the formation of a millisecond pulsar in binaries with Porb >~200d.

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