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X-ray Radiation from the Millisecond Pulsar J0437-4715 by Zavlin, V. E.; Pavlov, G. G.; Sanwal, D.; Manchester, R. N.; Truemper, J.; Halpern, J. P.; Becker, W. is a scholarly article available to read on EtoBox.

What is X-ray Radiation from the Millisecond Pulsar J0437-4715 about?

We report on spectral and timing observations of the nearest millisecond pulsar J0437-4715 with Chandra. The pulsar spectrum, detected up to 7 keV, cannot be described by a simple one-component model. We suggest that it consists of two components, a nonthermal power-law spectrum generated in the pulsar magnetosphere, with a photon index about 2, and a thermal spectrum emitted by heated polar caps, with a temperature decreasing outwards from 2 MK to 0.5 MK. The lack of spectral features in the thermal component suggests that the neutron star surface is covered by a hydrogen (or helium) atmosphere. The timing analysis shows one X-ray pulse per period, with a pulsed fraction of about 40% and the peak at the same pulse phase as the radio peak. No synchrotron pulsar-wind nebula is seen in the X-rays.

Author

Zavlin, V. E.; Pavlov, G. G.; Sanwal, D.; Manchester, R. N.; Truemper, J.; Halpern, J. P.; Becker, W.

Published

2001

Language

EN