Millisecond Neutron Star Spins in Low-Mass X-ray Binaries

Details Millisecond Neutron Star Spins in Low-Mass X-ray Binaries Millisecond Neutron Star Spins in Low-Mass X-ray Binaries

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999head....4.3801c&link_type=abstract

American Astronomical Society, HEAD meeting #4, #38.01; Bulletin of the American Astronomical Society, Vol. 31, p.741

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Scientific paper

A distinct population of old, weakly-magnetic millisecond radio pulsars, mostly in binaries, emerged over a decade ago. Despite a consensus that these neutron stars were spun up through prolonged accretion in low-mass X-ray binaries (LMXBs), definite observational proof --- detection of demonstrably coherent X-ray pulsations from neutron stars in LMXBs --- eluded observers for years. The recent discovery of persistent 2.5 ms X-ray pulsations in SAX J1808.4-3658 is the first direct confirmation of the spin-up (``recycling'') hypothesis. However, the absence of other clear examples remains puzzling. I will review the observational evidence for millisecond neutron star spins in LMXBs in general, and I will also discuss what we have learned from SAX J1808.4-3658 in particular.

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