Anomalous X-ray pulsars: Persistent States with Fallback Disks

Details Anomalous X-ray pulsars: Persistent States with Fallback Disks Anomalous X-ray pulsars: Persistent States with Fallback Disks

2006-12-20

arxiv.org/abs/astro-ph/0612587v1

Astrophys.J.657:441-447,2007

Astronomy and Astrophysics

Astrophysics

6 pages, 1 figure, to appear in proceedings of the conference "Isolated Neutron Stars: From the Interior to the Surface" eds.

Scientific paper

10.1086/510303

The anomalous X-ray pulsar 4U 0142+61 was recently detected in the mid infrared bands with the SPITZER Observatory (Wang, Chakrabarty & Kaplan 2006). This observation is the first instance for a disk around an AXP. From a reanalysis of optical and infrared data, we show that the observations indicate that the disk is likely to be an active disk rather than a passive dust disk beyond the light cylinder, as proposed in the discovering paper. Furthermore, we show that the irradiated accretion disk model can also account for all the optical and infrared observations of the anomalous X-ray pulsars in the persistent state.

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