Optical and Infrared Emission from the AXPs and SGRs

Details Optical and Infrared Emission from the AXPs and SGRs Optical and Infrared Emission from the AXPs and SGRs

2006-08-14

arxiv.org/abs/astro-ph/0608288v1

Astronomy and Astrophysics

Astrophysics

12 pages, accepted for publication in ApJ Letters

Scientific paper

We show that the irradiated accretion disk model can account for all the optical and infrared observations of the anomalous X-ray pulsars in the persistent state. Model fits do not constrain the outer disk radii, while placing an upper limit to the inner disk radii, and thus to the strength of the dipole component of the stellar magnetic field. While magnetar fields (B_* > 10^{14} G) in higher multipoles are compatible with the irradiated disk model, magnetic dipole components of magnetar strength are not consistent with optical data.

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