Phase Shifts in the Bursting Pulsar, GRO J1744-28, as a Probe of Accretion Processes in Magnetized Neutron Stars

Session 113 - Neutron Stars & Pulsars.
Oral session, Saturday, January 10
International Ballroom East,

[113.01] Phase Shifts in the Bursting Pulsar, GRO J1744-28, as a Probe of Accretion Processes in Magnetized Neutron Stars

M. J. Stark (NASA/GSFC and U. of MD, College Park)

Phase shifts have been observed in the light-curve of the nearly perfectly sinusoidal Bursting Pulsar, GRO J1744-28, associated with the large X-ray bursts observed during the two outbursts in early 1996 and 1997 and during the quiescent period in between these outbursts. These phase shifts probe the interaction between the magnetosphere and the inner edge of the accretion disk. Such a probe can distinguish between models of accretion onto a magnetized neutron star. It may also explain why this source is unique among the observed stars in being the source of both regular type II (Accretion instability) X-ray bursts and X-ray pulsation.

If you would like more information about this abstract, please follow the link to lheawww.gsfc.nasa.gov/~stark/pub/aas-jan98.html. This link was provided by the author. When you follow it, you will leave the the Web space for this meeting; to return, you should use the Back button on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: Michael.J.Stark.1@gsfc.nasa.gov

Program listing for Saturday