Activity Cycles of the X-ray Pulsars in the SMC

Details Activity Cycles of the X-ray Pulsars in the SMC Activity Cycles of the X-ray Pulsars in the SMC

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprn17068c&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

The large X-ray pulsar population of the SMC has been monitored weekly for approximately three years using the PCA detector on board RXTE. Many sources show transient X-ray outbursts with approximately regular intervals between recurrences providing estimates of orbital periods in these systems. These results provide, for the first time, information on activity cycles in a large well defined population of X-ray binaries outside our Galaxy. The project is shedding light on the period and luminosity distribution of the SMC X-ray pulsar population as well as providing detailed pictures of individual systems. These results are expected to aid in determining why the X-ray pulsar population of the SMC is so large compared to what would be predicted if the X-ray pulsar density in the SMC was the same as for the Galaxy.

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