Is GX5 - 1 a millisecond pulsar?

Details Is GX5 - 1 a millisecond pulsar? Is GX5 - 1 a millisecond pulsar?

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.316..239a&link_type=abstract

Nature (ISSN 0028-0836), vol. 316, July 18, 1985, p. 239-241.

Physics

337

Pulsars, Stellar Mass Accretion, X Ray Sources, Accretion Disks, Galactic Bulge, Stellar Models, Stellar Rotation

Scientific paper

It is proposed that the quasi-periodic behavior of the bright galactic bulge source GX5 - 1 results from fluctuations in accretion rate onto a millisecond pulsar which has been spun up by accretion to its steady-state spin rate. According to models that use spin-up by accretion to bring the neutron stars to steady-state fast short periods, galactic bulge sources are likely progenitors of millisecond pulsars. After steady state is achieved in these systems, accretion may continue without further spin-up, so that for a substantial fraction of the lifetime of a galactic bulge X-ray source, the neutron star may already be spinning rapidly at the equilibrium spin. The behavior of GX5 - 1 can be explained in terms of deviations from this equilibrium state resulting from changes in the accretion rate.

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