Volume 457, Number 1, October I 2006
|Page(s)||L5 - L8|
|Published online||12 September 2006|
Letter to the Editor
Interrelation between radio and X-ray signatures of drifting subpulses in pulsars
Institute of Astronomy, University of Zielona Góra, Lubuska 2, 65-265 Zielona Góra, Poland e-mail: firstname.lastname@example.org
2 Department of Physics, University of Nevada, Las Vegas, USA
3 Abastumani Astrophysical Observatory, Al. Kazbegi ave. 2a, 0160 Tbilisi, Georgia
Accepted: 25 July 2006
Aims.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.
Methods.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 Lx from heated polar cap depends only on the observational tertiary subpulse drift periodicity (polar cap carousel time).
Results.Within our model of partially screened gap we derived the simple formula relating Lx and , and showed that it holds for PSRs B0943+10 and B1133+16, which are the only two pulsars in which both Lx and are presently known.
Key words: pulsars: general / stars: neutron / X-ray: stars / radiation mechanism: thermal
© ESO, 2006
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