Unusual Pulsed X-Ray Emission from the Young, High Magnetic Field Pulsar PSR J1119--6127

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We present XMM-Newton observations of the radio pulsar PSR J1119-6127, which has an inferred age of 1,700 yr and surface dipole magnetic field strength of 4.1 x 10{sup 13} G. We report the first detection of pulsed X-ray emission from PSR J1119-6127. In the 0.5-2.0 keV range, the pulse profile shows a narrow peak with a very high pulsed fraction of (74 {+-} 14)%. In the 2.0-10.0 keV range, the upper limit for the pulsed fraction is 28% (99% confidence). The pulsed emission is well described by a thermal blackbody model with a temperature of T{infinity} = 2.4{sub -0.2}{sup +0.3} ... continued below

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Gonzalez, M E; Kaspi, V M; Camilo, F; Gaensler, B M & Pivovaroff, M J August 5, 2005.

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We present XMM-Newton observations of the radio pulsar PSR J1119-6127, which has an inferred age of 1,700 yr and surface dipole magnetic field strength of 4.1 x 10{sup 13} G. We report the first detection of pulsed X-ray emission from PSR J1119-6127. In the 0.5-2.0 keV range, the pulse profile shows a narrow peak with a very high pulsed fraction of (74 {+-} 14)%. In the 2.0-10.0 keV range, the upper limit for the pulsed fraction is 28% (99% confidence). The pulsed emission is well described by a thermal blackbody model with a temperature of T{infinity} = 2.4{sub -0.2}{sup +0.3} x 10{sup 6} K and emitting radius of 3.4{sub -0.3}{sup +1.8} km (at a distance of 8.4 kpc). Atmospheric models result in problematic estimates for the distance/emitting area. PSR J1119-6127 is now the radio pulsar with smallest characteristic age from which thermal X-ray emission has been detected. The combined temporal and spectral characteristics of this emission are unlike those of other radio pulsars detected at X-ray energies and challenge current models of thermal emission from neutron stars.

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PDF-file: 9 pages; size: 0.5 Mbytes

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  • Journal Name: Astrophysics Journal; Journal Volume: 630

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  • Report No.: UCRL-JRNL-214413
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 881873
  • Archival Resource Key: ark:/67531/metadc885579

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Office of Scientific & Technical Information Technical Reports

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  • August 5, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 2, 2016, 5:04 p.m.

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Gonzalez, M E; Kaspi, V M; Camilo, F; Gaensler, B M & Pivovaroff, M J. Unusual Pulsed X-Ray Emission from the Young, High Magnetic Field Pulsar PSR J1119--6127, article, August 5, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc885579/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.