M. E. Gonzalez et al. 2005 ApJ 630 489 doi:10.1086/432032
Unusual Pulsed X-Ray Emission from the Young, High Magnetic Field Pulsar PSR J1119–6127
FREEM. E. Gonzalez1, V. M. Kaspi1, F. Camilo2, B. M. Gaensler3 and M. J. Pivovaroff4
Show affiliationsWe present XMM-Newton observations of the radio pulsar PSR J1119-6127, which has an inferred age of 1700 yr and surface dipole magnetic field strength of 4.1 × 1013 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∞ = 2.4
× 106 K and emitting radius of 3.4
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.
- Subject headings
ISM: individual (G292.2–0.5); pulsars: individual (PSR J1119–6127); supernova remnants; X-rays: ISM
- Dates
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Issue 1 (2005 September 1)
Received 2005 March 10, accepted for publication 2005 May 2
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Unusual Pulsed X-Ray Emission from the Young, High Magnetic Field Pulsar PSR J1119–6127
M. E. Gonzalez et al. 2005 ApJ 630 489
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