Hostname: page-component-848d4c4894-jbqgn Total loading time: 0 Render date: 2024-07-02T10:13:07.596Z Has data issue: false hasContentIssue false
  • English
  • Français

Observational Consequences of Polar Cap Theories

Published online by Cambridge University Press:  14 August 2015

Andrew F. Cheng
Andrew F. Cheng*
Affiliation:
Department of Physics and Astronomy, Rutgers University, Piscataway, NJ 08854

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Possible observational consequences are outlined for pulsar models with positive ion outflow at the polar caps together with e+-e− pair production discharge there. A characteristic thermal x-ray luminosity is maintained by discharge heating in regions of positive current outflow. A decrease in polar cap thermal x-ray emission may occur during radio nulls. Two mechanisms are identified which can yield temporal modulation of the outflowing ion and e+-e− plasmas, and which may lead to modulation of coherent radio emission on observed microstructure timescales. These are: (1) polar cap temperature oscillations which occur preferentially in pulsars of low surface magnetic field, and (2) the tendency of sparks to migrate toward the convex side of the magnetic field lines.

Type
II. Radio Emission Mechanism
Information
Symposium - International Astronomical Union , Volume 95: Pulsars , 1981 , pp. 99 - 102
Copyright
Copyright © Reidel 1981 

References

Arons, J. and Scharlemann, E.T.: 1979, Astrophys. J. 231, p. 854.Google Scholar
Cheng, A.F. and Ruderman, M.: 1977, Astrophys. J. 214, p. 598.Google Scholar
Cheng, A.F. and Ruderman, M.: 1980 (CR), Astrophys. J. 235, p. 576.Google Scholar
Cordes, J.: 1979a, Australian J. Phys. 32, p. 9.CrossRefGoogle Scholar
Cordes, J.: 1979b, Space Sci. Rev. 24, p. 567.Google Scholar
Ferguson, D.: 1981, this volume.Google Scholar
Ferguson, D. and Seiradakis, J.: 1977, Astron. Astrophys. 64, p. 27.Google Scholar
Flowers, E., Lee, J.-F., Ruderman, M., Sutherland, P., Hillebrandt, W., and Müller, E.: 1977, Astrophys. J. 215, p. 291.Google Scholar