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Gamma-Ray Astrophysics and Galactic Structure

  • J. L. Puget
Chapter
Part of the Astrophysics and Space Science Library book series (ASSL, volume 70)

Abstract

Gamma-ray data (together with far-infrared and radio observations) are a powerful tool to study large-scale galactic structure, because of the absence of absorption even for column densities up to ∿ 1026 cm−2 Two satellite experiments have brought us gamma-ray intensities for Eγ > 35 M (Ficlitel et al., 1975, COS B Caravane Collaboration 1976). These gamma-rays are concentrated in the galactic plane and even at high latitude most of them are probably of galactic origin (Puget et al., 1976; Stecker, 1977; Schlickeiser, 1976). The extragalactic contribution at high latitude is less than 5 × 10−6 cm−2 s−1 sr−1.

Keywords

Column Density Galactic Plane Galactic Structure Galactic Origin Solar Vicinity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. C.O.S. B Caravane Collaboration: 1976, in The structure and content of the Galaxy and galactic gamma-rays, ed. C.E. Fichtel and F.W. Stecker, N.A.S.A., G.S.F.C., X-662–76-154, p. 39Google Scholar
  2. Dodds, D., Strong, A.W. and Wolfendale, W.W.: 1975, Monthly Notices Roy. Astron. Soc. 171, 569ADSGoogle Scholar
  3. Fichtel, C.E., Kniffen, D.A., Thomson, D.J., Bignami, G.F., Ögelman, H., Özel, M. A. and Turner, T.: 1975, Ap. J. 198, 163ADSCrossRefGoogle Scholar
  4. Fitzgerald, M.P.: 1968, Astron. J. 73., 983ADSCrossRefGoogle Scholar
  5. Kniffen, D.A., Fichtel, C.E. and Thomson, D.J.: 1976a, preprintGoogle Scholar
  6. Kniffen, D.A., Fichtel, C.E. and Thomson, D.J.: 1976b, in The structure and content of the Galaxy and galactic gamma-rays, ed. C.E. Fichtel and F.W. Stecker, N.A.S.A., G.C.F.C., X-662–76-154, p. 341Google Scholar
  7. Paul, J., Casse, M. and Cesarsky, C.J.: 1976, Ap. J., in pressGoogle Scholar
  8. Puget, J.L. and Stecker, F.W.: 1974, Ap. J. 191, 323ADSCrossRefGoogle Scholar
  9. Puget, J.L., Ryter, C., Serra, G. and Bignami, G.: 1976a, Astron. Astro- phys. 50, 247ADSGoogle Scholar
  10. Puget, J.L., Ryter, C. and Serra, G.: 1976b, in The structure and content of the Galaxy and galactic gamma-rays, ed. C.E. Fichtel and F.W. Stecker, N.A.S.A., G.S.F.C., X-662–76-154, p. 255Google Scholar
  11. Piccinotti, G. and Bignami, G.F.: 1976, preprintGoogle Scholar
  12. Roberts, W.: 1976, in The structure and content of the Galaxy and galactic gamma-rays, ed. C.E. Fichtel and F.W. Stecker, N.A.S.A., G.S.F.C., X-662–76-154, p. 128Google Scholar
  13. Ryter, C., Cesarsky, C. and Audouze, J.: 1975a, Ap. J. 198, 103ADSCrossRefGoogle Scholar
  14. Ryter, C.: 1975b, Meeting of the American Physical Society, Washington D.C., 28 April - 1 MayGoogle Scholar
  15. Shukla, P.G. and Paul, J.: 1976, preprintGoogle Scholar
  16. Schlickeisser, R. and Thielheim, K.O.: 1976, preprintGoogle Scholar
  17. Stecker, F.W., Puget, J.L., Strong, A.W. and Bredekamp, J.H.: 1974, Ap. J. Lett. 188, L59ADSCrossRefGoogle Scholar
  18. Stecker, F.W.: 1976, in The structure and content of the Galaxy and galactic gamma-rays, ed. C.E. Fichtel and F.W. Stecker, N.A.S.A., G.S.F.C., X-662–76-154, p. 357Google Scholar
  19. Thomson, D.J., Fichtel, C.E., Hartman, R.C., Kniffen, D.A. and Lamb, R.C.: 1976, preprintGoogle Scholar
  20. Wolfendale, A.W. and Worall, D.M.: 1976, preprintGoogle Scholar
  21. Zuckerman, B. and Palmer, P.: 1974, Annual Review of Astron. Ap. 12, 279.ADSCrossRefGoogle Scholar

Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1977

Authors and Affiliations

  • J. L. Puget
    • 1
  1. 1.D.A.P.H.EObservatoire de MeudonFrance

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