Interrelation between radio and X-ray signatures of drifting subpulses in pulsars

Abstract

We examined a model of partially screened gap region above the polar cap, in which the electron-positron plasma generated by sparking discharges coexists with thermionic flow ejected by the bombardment of the surface beneath these sparks. Our special interest was the polar cap heating rate and the subpulse drifting rate, both phenomena presumably associated with sparks operating at the polar cap. We investigated correlation between the intrinsic drift rate and polar cap heating rate and found that they are coupled to each other in such a way that the thermal X-ray luminosity $L_x$ from heated polar cap depends only on the observational tertiary subpulse drift periodicity ${\hat{P}}_3$ (polar cap carousel time). Within our model of partially screened gap we derived the simple formula relating $L_x$ and ${\hat{P}}_3$, and showed that it holds for PSRs B0943$+$10 and B1133+16, which are the only two pulsars in which both $L_x$ and ${\hat{P}}_3$ are presently known.

arXiv comment4 pages

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Cited by in corpus (7)

• XMM-Newton Observations of Radio Pulsars B0834+06 and B0826-34 and Implications for Pulsar Inner Accelerator
• XMM-Newton observations of SN1987A
• The influence of nondipolar magnetic field and neutron star precession on braking indexes of radiopulsars
• Discovery of a remarkable subpulse drift pattern in PSR B0818-41
• XMM-Newton observation of the nearby pulsar B1133+16
• X-ray pulsar radiation from polar cap heated by back-flow bombardment
• Single pulse analysis of PSR B1133+16 at 8.35 GHz and carousel circulation time