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Pulsar Polar Cap Heating and Surface Thermal X-Ray Emission I. Curvature Radiation Pair Fronts

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arxiv astro-ph/0104146 v1 pith:UBIFYBWC submitted 2001-04-09 astro-ph

Alice K. Harding (NASA-GSFC) , Alexander G. Muslimov (Emergent Technologies) This is my paper
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keywords x-rayheatingeffectfieldpairpulsarcurvaturemagnetic
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We investigate the effect of pulsar polar cap (PC) heating produced by positrons returning from the upper pair formation front. Our calculations are based on a self-consistent treatment of the pair dynamics and the effect of electric field screening by the returning positrons. We calculate the resultant X-ray luminosities, and discuss the dependence of the PC heating efficiencies on pulsar parameters, such as characteristic spin-down age, spin period, and surface magnetic field strength. In this study we concentrate on the regime where the pairs are produced in a magnetic field by curvature photons emitted by accelerating electrons. Our theoretical results are not in conflict with the available observational X-ray data and suggest that the effect of PC heating should significantly contribute to the thermal X-ray fluxes from middle-aged and old pulsars. The implications for current and future X-ray observations of pulsars are briefly outlined.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. A NICER view of the millisecond pulsar PSR J2124$-$3358: evidence for a helium atmosphere

    astro-ph.HE 2026-07 conditional novelty 5.5 of 10

    X-PSI modeling of NICER/Chandra data for PSR J2124−3358 substantially prefers a helium atmosphere, giving M = 1.8 ± 0.5 M⊙ and Req = 11.7^{+2.6}_{-3.0} km with two slightly non-antipodal hot spots.

  2. Gamma Rays from ALP-Photon Conversion and Inverse Compton Reprocessing in Neutron Star Magnetospheres

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  3. Pulse profile modelling of the 2024 outburst of the accreting millisecond pulsar SRGA J144459.2-604207

    astro-ph.HE 2026-05 conditional novelty 5.0 of 10

    Joint NICER+IXPE pulse-profile modeling of SRGA J144459.2-604207 favors large neutron-star mass and radius with two independent hotspots but shows strong sensitivity to joint-analysis methodology.

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