Anomalous X-ray pulsars: Persistent states with fallback disks

Ü Ertan*, M. A. Alpar, M. H. Erkut, K. Y. Ekśi, Ş ÇalIśkan

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

The anomalous X-ray pulsar 4U 0142+61 was recently detected in the mid infrared bands with the SPITZER Observatory (Wang, Chakrabarty and Kaplan: Nature 440, 772 (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.

Original languageEnglish
Title of host publicationIsolated Neutron Stars
Subtitle of host publicationFrom The Surface To The Interior
PublisherSpringer Netherlands
Pages73-77
Number of pages5
ISBN (Print)9781402059971
DOIs
Publication statusPublished - 2007

Keywords

  • Accretion and accretion disks
  • Neutron stars
  • Pulsars

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