Disk Diagnostics and Torque Mapping of X-Ray Pulsars: BATSE Observations of A0535+262

Details Disk Diagnostics and Torque Mapping of X-Ray Pulsars: BATSE Observations of A0535+262 Disk Diagnostics and Torque Mapping of X-Ray Pulsars: BATSE Observations of A0535+262

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...459..244g&link_type=abstract

Astrophysical Journal v.459, p.244

Astronomy and Astrophysics

Astronomy

11

Accretion, Accretion Disks, Stars: Neutron, Stars: Binaries: Close, Stars: Magnetic Fields, Stars: Rotation, X-Rays: Stars

Scientific paper

I use results from the recent BATSE observations of the accreting X-ray pulsar A0535 +262 to show the diagnostic value of simultaneous data on torque and quasi-periodic oscillations. These diagnostics yield the first evidence that inner accretion disks in X-ray pulsars are consistent with a "middle-region" Shakura-Sunyaev disk model and not with some other well-known disk models, irrespective of the relation between the X-ray flux I and the accretion rate M. Indeed, the A -I relation can be independently probed by this method, which shows that the observations are well represented by a relation of the form I A with = 1 + 0.1. Mapping out the entire torque function by this method may also become possible in the near future.

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