Anomalous X-ray pulsars: Persistent States with Fallback Disks

  title={Anomalous X-ray pulsars: Persistent States with Fallback Disks},
  author={Unal Ertan and M. Ali Alpar and M. Hakan Erkut and Kazım Yavuz Ekşi and Sirin Caliskan},
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… 
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