Anomalous X-ray pulsars: Persistent states with fallback disks

Ü Ertan; M. A. Alpar; M. H. Erkut; K. Y. Ekşi; Ş Çalişkan

doi:10.1007/s10509-007-9328-8

Anomalous X-ray pulsars: Persistent states with fallback disks

Ü Ertan^*, M. A. Alpar, M. H. Erkut, K. Y. Ekşi, Ş Çalişkan

^*Corresponding author for this work

Department of Physics Engineering

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

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 language	English
Pages (from-to)	73-77
Number of pages	5
Journal	Astrophysics and Space Science
Volume	308
Issue number	1-4
DOIs	https://doi.org/10.1007/s10509-007-9328-8
Publication status	Published - Apr 2007

Funding

We acknowledge support from the Astrophysics and Space Forum at Sabancı University. S.Ç. acknowledges support from the FP6 Marie Curie Reintegration Grant, INDAM.

Funders	Funder number
Sabancı University
Istituto Nazionale di Alta Matematica "Francesco Severi"
Sixth Framework Programme

Keywords

Accretion and accretion disks
Neutron stars
Pulsars

Access to Document

10.1007/s10509-007-9328-8

Cite this

@article{58be9a5e2be44062ae07b40052e24d23,

title = "Anomalous X-ray pulsars: Persistent states with fallback disks",

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.",

keywords = "Accretion and accretion disks, Neutron stars, Pulsars",

author = "{\"U} Ertan and Alpar, {M. A.} and Erkut, {M. H.} and Ek{\c s}i, {K. Y.} and {\c S} {\c C}ali{\c s}kan",

year = "2007",

month = apr,

doi = "10.1007/s10509-007-9328-8",

language = "English",

volume = "308",

pages = "73--77",

journal = "Astrophysics and Space Science",

issn = "0004-640X",

publisher = "Springer Netherlands",

number = "1-4",

}

TY - JOUR

T1 - Anomalous X-ray pulsars

T2 - Persistent states with fallback disks

AU - Ertan, Ü

AU - Alpar, M. A.

AU - Erkut, M. H.

AU - Ekşi, K. Y.

AU - Çalişkan, Ş

PY - 2007/4

Y1 - 2007/4

N2 - 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.

AB - 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.

KW - Accretion and accretion disks

KW - Neutron stars

KW - Pulsars

UR - http://www.scopus.com/inward/record.url?scp=34248202565&partnerID=8YFLogxK

U2 - 10.1007/s10509-007-9328-8

DO - 10.1007/s10509-007-9328-8

M3 - Article

AN - SCOPUS:34248202565

SN - 0004-640X

VL - 308

SP - 73

EP - 77

JO - Astrophysics and Space Science

JF - Astrophysics and Space Science

IS - 1-4

ER -

Anomalous X-ray pulsars: Persistent states with fallback disks

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this