V. E. Zavlin et al. 2002 ApJ 569 894 doi:10.1086/339351
V. E. Zavlin1, G. G. Pavlov2, D. Sanwal2, R. N. Manchester3, J. Trümper1, J. P. Halpern4 and W. Becker1
Show affiliationsWe report on spectral and timing observations of the nearest millisecond pulsar, J0437-4715, with the Chandra X-Ray Observatory. 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 γ ≈ 2, and a thermal spectrum emitted by heated polar caps, with a temperature decreasing outward from 2 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 X-rays.
pulsars: individual (PSR J0437–4715); stars: neutron; X-rays: stars
Issue 2 (2002 April 20)
Received 2001 August 30, accepted for publication 2001 December 26
V. E. Zavlin et al. 2002 ApJ 569 894
M J Martins 1993 J. Phys. A: Math. Gen. 26 L877
I D Avramov 2009 Meas. Sci. Technol. 20 124006
O Novotný et al 2009 J. Phys.: Conf. Ser. 192 012021
Marco Valerio Battisti 2009 J. Phys.: Conf. Ser. 189 012005
Avishek R Aiyar et al 2009 Smart Mater. Struct. 18 115002
Z R Abrams et al 2007 Nanotechnology 18 495602
Frank Deppisch and Apostolos Pilaftsis JHEP10(2008)080
T Maurice Rice et al 2009 New J. Phys. 11 055052
Stephen Mrenna and Peter Richardson JHEP05(2004)040