A pulsar-atmosphere model for PSR 0656+14

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dc.creatorLloyd, D. A.
dc.creatorPerna, R.
dc.creatorSlane, P.
dc.creatorNicastro, F.
dc.creatorHernquist, L.
dc.date2003-06-11
dc.date.accessioned2026-07-07T02:08:45Z
dc.date.available2026-07-07T02:08:45Z
dc.descriptionWe present a pulsar-atmosphere (PA) model for modulated thermal X-ray emission from cooling magnetized neutron stars. The model synthesizes the spectral properties of detailed stellar atmosphere calculations with the non-uniform surface properties anticipated for isolated, aging radio pulsars, and general relativistic effects on photon trajectories. We analyze the archival Chandra observations of the middle-aged radio pulsar PSR 0656+14 with the PA model and find it is an excellent representation of the phase-averaged X-ray spectrum for a broad range of polar effective temperature T_p and column density N_H ~ 10^{20} cm^{-2}. The spectral fits favor a sub-solar neutron star mass M < 1.0 M_{\sun}, a large radius R=15-16 km for a source distance d ~ 190 pc, while retaining consistency with theoretical neutron star equations-of-state. The modulated spectrum constrains the angular displacement of the pulsar spin axis to 30 +/- 2 \arcdeg with respect to the line of sight.
dc.description21 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0306235
dc.identifierhttp://arxiv.org/abs/astro-ph/0306235
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/6180
dc.subjectAstrophysics
dc.titleA pulsar-atmosphere model for PSR 0656+14
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