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X-ray Radiation from the Millisecond Pulsar J0437-4715 | | V.E. Zavlin
; G.G. Pavlov
; D. Sanwal
; R.N. Manchester
; J. Truemper
; J.P. Halpern
; W. Becker
; | | Date: |
26 Dec 2001 | | Subject: | astro-ph | | Affiliation: | MPE), G.G. Pavlov, D. Sanwal (PSU), R.N. Manchester (ATNF), J. Truemper (MPE), J.P. Halpern (Columbia Univ.), W. Becker (MPE | | Abstract: | 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. | | Source: | arXiv, astro-ph/0112544 | | Services: | Forum | Review | PDF | Favorites | |
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