A relativistically broadened iron line from an Accreting Millisecond Pulsar

Rosario Iaria; Tiziana Di Salvo; Antonino D'Ai'; null Riggio; null Burderi; null Menna; null Papitto

A relativistically broadened iron line from an Accreting Millisecond Pulsar

Rosario Iaria, Tiziana Di Salvo, Antonino D'Ai', Riggio, Burderi, Menna, Papitto

Fisica e Chimica - Emilio Segrè

Risultato della ricerca: Chapter

Abstract

The capabilities of XMM-Newton have been fully exploited to detect a broadened iron Kα emission line from the 2.5 ms Accreting Millisecond Pulsar, SAX J1808.4-3658. The energy of the transition is compatible with fluorescence from neutral/lowly ionized iron. The observed large width (FWHM more than 1 keV) can be explained through Doppler and relativistic broadening from the inner rings of an accretion disc close to the NS. From a fit of the line shape with a diskline model we obtain an estimate of the inner disc radius of 18.0-5.6+7.6km for a 1.4 M⊙ neutron star. The disc is therefore truncated inside the corotation radius (31 km for SAX J1808.4-3658), in agreement with the observation of coherent pulsations. From our estimate of the inner disc radius, we infer that the magnetic field of the neutron star is in the range 1-5×108G. © 2010 American Institute of Physics.

Lingua originale	English
Titolo della pubblicazione ospite	X-RAY ASTRONOMY-2009: PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES
Pagine	77-80
Numero di pagine	4
Stato di pubblicazione	Published - 2010

Serie di pubblicazioni

Nome	AIP CONFERENCE PROCEEDINGS

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@inbook{1aae58c40801465d90b2a685ad53d4ed,

title = "A relativistically broadened iron line from an Accreting Millisecond Pulsar",

abstract = "The capabilities of XMM-Newton have been fully exploited to detect a broadened iron Kα emission line from the 2.5 ms Accreting Millisecond Pulsar, SAX J1808.4-3658. The energy of the transition is compatible with fluorescence from neutral/lowly ionized iron. The observed large width (FWHM more than 1 keV) can be explained through Doppler and relativistic broadening from the inner rings of an accretion disc close to the NS. From a fit of the line shape with a diskline model we obtain an estimate of the inner disc radius of 18.0-5.6+7.6km for a 1.4 M⊙ neutron star. The disc is therefore truncated inside the corotation radius (31 km for SAX J1808.4-3658), in agreement with the observation of coherent pulsations. From our estimate of the inner disc radius, we infer that the magnetic field of the neutron star is in the range 1-5×108G. {\textcopyright} 2010 American Institute of Physics.",

author = "Rosario Iaria and {Di Salvo}, Tiziana and Antonino D'Ai' and Riggio and Burderi and Menna and Papitto",

year = "2010",

language = "English",

isbn = "9780735407954",

series = "AIP CONFERENCE PROCEEDINGS",

pages = "77--80",

booktitle = "X-RAY ASTRONOMY-2009: PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES",

}

TY - CHAP

T1 - A relativistically broadened iron line from an Accreting Millisecond Pulsar

AU - Iaria, Rosario

AU - Di Salvo, Tiziana

AU - D'Ai', Antonino

AU - Riggio, null

AU - Burderi, null

AU - Menna, null

AU - Papitto, null

PY - 2010

Y1 - 2010

N2 - The capabilities of XMM-Newton have been fully exploited to detect a broadened iron Kα emission line from the 2.5 ms Accreting Millisecond Pulsar, SAX J1808.4-3658. The energy of the transition is compatible with fluorescence from neutral/lowly ionized iron. The observed large width (FWHM more than 1 keV) can be explained through Doppler and relativistic broadening from the inner rings of an accretion disc close to the NS. From a fit of the line shape with a diskline model we obtain an estimate of the inner disc radius of 18.0-5.6+7.6km for a 1.4 M⊙ neutron star. The disc is therefore truncated inside the corotation radius (31 km for SAX J1808.4-3658), in agreement with the observation of coherent pulsations. From our estimate of the inner disc radius, we infer that the magnetic field of the neutron star is in the range 1-5×108G. © 2010 American Institute of Physics.

AB - The capabilities of XMM-Newton have been fully exploited to detect a broadened iron Kα emission line from the 2.5 ms Accreting Millisecond Pulsar, SAX J1808.4-3658. The energy of the transition is compatible with fluorescence from neutral/lowly ionized iron. The observed large width (FWHM more than 1 keV) can be explained through Doppler and relativistic broadening from the inner rings of an accretion disc close to the NS. From a fit of the line shape with a diskline model we obtain an estimate of the inner disc radius of 18.0-5.6+7.6km for a 1.4 M⊙ neutron star. The disc is therefore truncated inside the corotation radius (31 km for SAX J1808.4-3658), in agreement with the observation of coherent pulsations. From our estimate of the inner disc radius, we infer that the magnetic field of the neutron star is in the range 1-5×108G. © 2010 American Institute of Physics.

UR - http://hdl.handle.net/10447/229368

M3 - Chapter

SN - 9780735407954

T3 - AIP CONFERENCE PROCEEDINGS

SP - 77

EP - 80

BT - X-RAY ASTRONOMY-2009: PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES

ER -