Long-Term Monitoring of Anomalous X-ray Pulsars

Details Long-Term Monitoring of Anomalous X-ray Pulsars Long-Term Monitoring of Anomalous X-ray Pulsars

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.9505g&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #95.05; Bulletin of the American Astronomical Society, Vol. 33, p.1446

Astronomy and Astrophysics

Astronomy

Scientific paper

The nature of anomalous X-ray pulsars (AXPs) has been a mystery since the discovery of the first example some 20 years ago. The leading model for AXPs is that they are isolated ultra-magnetized neutron stars, or "magnetars". It has also been suggested that AXPs might be accreting from an accretion disk made up of fall-back material. In order to test these models, the Rossi X-ray Timing Explorer (RXTE) has been used to observe all 5 known AXPs, as part of a long-term monitoring project. ln this poster we will present recent results from this project, including the sources' timing properties as deduced from phase-coherent studies, the sources' pulsed flux-time series and pulse morphology histories. We will also present recent results from searches for mini-outbursts as are observed in SGRs, as well as for quasi-periodic oscillations (QPOs) as observed in accreting X-ray pulsars. This work is funded by NASA and NSERC.

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