Thermal radiation from hot polar cap in pulsars
نویسندگان
چکیده
Thermal radiation from hot polar caps is examined in radio pulsars with drifting subpulses. It is argued that if these subpulses correspond to sparking discharges of the inner acceleration region right above the polar cap surface then a simple relationship between the observed subpulse drift rate in radio and thermal X-ray luminosity from the polar cap heated by sparks should exist. This relationship is derived and tested in pulsars for which an appropriate good quality data is available.
منابع مشابه
X-ray pulsar radiation from polar cap heated by back-flow bombardment
We consider the problem of the thermal X-ray radiation from the hot polar cap of radio pulsars showing evidence of E×B subpulse drift in radio band. In our resent Paper I, within the partially screened gap (PSG) model of inner acceleration region we derived a simple relationship between the drift rate of subpulses observed in a radio-band and the thermal X-ray luminosity from polar caps heated ...
متن کاملX-ray pulsar radiation from polar caps heated by back-flow bombardment
We consider the problem of the thermal X-ray radiation from the hot polar caps of radio pulsars that show evidence of E × B subpulse drift in radio band. In our recent Paper I, using the partially screened gap (PSG) model of inner acceleration region we derived a simple relationship between the drift rate of subpulses observed in a radio-band and the thermal X-ray luminosity from polar caps hea...
متن کاملFull Polar Cap Cascade Scenario: Γ-ray and X-ray Luminosities from Spin-powered Pulsars
Canonical polar cap cascade models involve curvature radiation (CR) or inverse Compton scattering (ICS) of the primary particles and synchrotron radiation (SR) of the higher generation pairs. Here we modify such a cascade picture to include the ICS of the higher generation pairs. In such a “full-cascade” scenario, not only the perpendicular portion of the energy of the pairs goes to high energy...
متن کاملGamma-ray and X-ray luminosities from spin-powered pulsars in the full polar cap cascade model
We modify the conventional curvature radiation (inverse Compton scattering) + synchrotron radiation polar cap cascade model by including the inverse Compton scattering of the higher generation pairs. Within the framework of the space-chargelimited-flow acceleration model with frame-dragging proposed by Harding & Muslimov (1998), such a full polar cap cascade scenario can well reproduce the Lγ ∝...
متن کاملTitle Multicomponent X-ray emissions from regions near or on the pulsar surface
We present a model of X-ray emission from rotation-powered pulsars, which in general consist of one nonthermal component, two hard thermal components, and one soft thermal component. The nonthermal X-rays come from synchrotron radiation of eB pairs created in the strong magnetic Ðeld near the neutron star surface by curvature photons emitted by charged particles on their way from the outer gap ...
متن کامل