Astrophysics and Space Science

, Volume 18, Issue 2, pp 403–407 | Cite as

Some limits on cosmic-ray heating ofHI clouds by magnetic stars

  • B. N. G. Guthrie
Article
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Abstract

Estimates are made of the low-energy, cosmic-ray power generated by the rotational braking of magnetic Ap stars through interaction with the interstellar medium. The resulting cosmic-ray power density (≲1.4×10−29 J s−1 m−3) in the galactic plane is at least three orders too small to maintain the observed kinetic temperatures (∼100 K) ofHi clouds. About 0.4% ofHi clouds contain an Ap star; in such cases ∼1026 J s−1 may be generated by the star during the early part of its Main Sequence life-time, but this makes only a small contribution to the heating of the cloud.

Keywords

Power Density Early Part Small Contribution Interstellar Medium Main Sequence 

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References

  1. Abt, H. A., Clements, A. E., Lyn, R. D., and Harris, D. H.: 1969,Astron. J. 74, 1153.Google Scholar
  2. Abt, H. A. and Jewsbury, C. P.: 1969,Astrophys. J. 156, 983.Google Scholar
  3. Babcock, H. W.: 1958,Astrophys. J. Suppl. Ser. 3, 141.Google Scholar
  4. Bergeron, J. and Souffrin, S.: 1971,Astron. Astrophys. 11, 40.Google Scholar
  5. Burke, J. A.: 1967,Monthly Notices Roy. Astron. Soc. 136, 389.Google Scholar
  6. Field, G. B., Rather, J. D. G., Annestad, P. A., and Orszag, S. A.: 1968,Astrophys. J. 151, 953.Google Scholar
  7. Fowler, W. A., Reeves, H., and Silk, J.: 1970,Astrophys. J. 162, 49.Google Scholar
  8. Guthrie, B. N. G.: 1971,Astrophys. Space Sci. 13, 168.Google Scholar
  9. Havnes, O.: 1971,Astron. Astrophys. 13, 52.Google Scholar
  10. Havnes, O. and Conti, P. S.: 1971,Astron. Astrophys. 14, 1.Google Scholar
  11. Hjellming, R. M., Gordon, C. P., and Gordon, K. J.: 1969,Astron. Astrophys. 2, 202.Google Scholar
  12. Hyland, A. R.: 1967a, in R. C. Cameron (ed.),The Magnetic and Related Stars, Mono Book Corporation, Baltimore, p. 311.Google Scholar
  13. Hyland, A. R.: 1967b,Nature 214, 899.Google Scholar
  14. Ianna, P. A.: 1970,Publ. Astron. Soc. Pacific 82, 825.Google Scholar
  15. Lindoff, U.: 1968,Arkiv Astron. 5, 1.Google Scholar
  16. Plavec, M.: 1968,Adv. Astron. Astrophys. 6, 202.Google Scholar
  17. Preston, G. W.: 1970, in A. Slettebak (ed.),Stellar Rotation, D. Reidel Publishing Company, Dordrecht, p. 254.Google Scholar
  18. Renson, P.: 1972,Publ. Astron. Soc. Japan 24, 149.Google Scholar
  19. Slettebak, A.: 1955,Astrophys. J. 121, 653.Google Scholar
  20. Spitzer, L.: 1968, inDiffuse Matter in Space, J. Wiley & Sons, New York.Google Scholar
  21. Spitzer, L. and Scott, E. H.: 1969,Astrophys. J. 158, 161.Google Scholar
  22. Spitzer, L. and Tomasko, M. G.: 1968,Astrophys. J. 152, 971.Google Scholar
  23. Werner, M. W., Silk, J., and Rees, M. J.: 1970,Astrophys. J. 161, 965.Google Scholar
  24. Whaling, W.: 1958,Encyclopedia of Physics 34, 193, J. Springer, Berlin.Google Scholar
  25. Wickramasinghe, N. C.: 1970,Nature 227, 587.Google Scholar

Copyright information

© D. Reidel Publishing Company 1972

Authors and Affiliations

  • B. N. G. Guthrie
    • 1
  1. 1.Royal ObservatoryEdinburghScotland

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