Hostname: page-component-77c89778f8-gq7q9 Total loading time: 0 Render date: 2024-07-17T15:26:20.914Z Has data issue: false hasContentIssue false
  • English
  • Français

Galactic line emission from 1–10 keV

Published online by Cambridge University Press:  14 August 2015

Gary Steigman  and
Joseph Silk
Gary Steigman
Affiliation:
Institute of Theoretical Astronomy, Cambridge, England
Joseph Silk
Affiliation:
Institute of Theoretical Astronomy, Cambridge, England

Abstract

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.

Calculations are given of K-series X-rays produced by interaction of both low energy cosmic rays and diffuse X-rays above 1 keV with heavier ions present in Hi regions. We further consider electron capture to excited states by cosmic ray nuclei of heavy elements, followed by cascades down to the ground state. It is found that the electron capture process may yield appreciable line intensities in the 1–10 keV range in the galactic plane.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 37: Non-Solar X- and Gamma-Ray Astronomy , 1970 , pp. 385 - 391
Copyright
Copyright © Reidel 1970 

References

[1] Hayakawa, S.: 1960, Publ. Astron. Soc. Japan, 12, 110.Google Scholar
[2] Hayakawa, S., Nishimura, S., and Takayanagi, K.: 1961, Publ. Astron. Soc. Japan 13.CrossRefGoogle Scholar
[3] Pikel'ner, S. B.: 1968, Soviet Astron.-AJ 11, 737.Google Scholar
[4] Balasubrahmanyan, V. K., Boldt, E., Palmeira, R. A. R., and Sandri, G.: 1968, Can. J. Phys. 46, 5633.Google Scholar
[5] Spitzer, L., and Tomasko, M. G.: 1968, Astrophys. J. 152, 971.Google Scholar
[6] Silk, J. and Werner, M. W.: 1969, Astrophys. J. 158, 185.Google Scholar
[7] Gloeckler, G. and Jokipii, J. R.: 1967, Astrophys. J. 148, 241.CrossRefGoogle Scholar
[8] Field, G. B., Goldsmith, D. W., and Habing, H. J.: 1969, Astrophys. J. 155, L149. The flux of 2 MeV cosmic rays used by these authors is about half that assumed in Reference [5], as heavy nuclei were included. This increases the heat input of a given flux of low-energy cosmic rays at 2 MeV/nucleon by a factor ∑z (N z ‘/N H ) CR (Z‘)2 .Google Scholar
[9] Greenberg, D. W.: 1969, Astrophys. J. 155, 451.CrossRefGoogle Scholar
[10] Hayakawa, S. and Matsuoka, M.: 1964, Supp. Prog. Theor. Phys. 30, 204.Google Scholar
[11] Boldt, E. and Serlemitsos, P.: 1969, paper presented at 128th meeting of A.A.S., Austin, Texas (December).Google Scholar
[12] Gould, R. J. and Burbidge, G. R.: 1963, Astrophys J. 138, 969.CrossRefGoogle Scholar
[13] Seward, F., Chodil, G., Mark, H., Swift, C., and Toor, A.: 1967, Astrophys. J. 150, 845.Google Scholar
[14] Heitler, W.: 1954, The Quantum Theory of Radiation, Clarendon Press, Oxford, Sec. 21.Google Scholar
[15] Bethe, H. A. and Salpeter, E. E.: 1957, Quantum Mechanics of One-And-Two Electron Atoms, Springer-Verlag, Berlin, Sec. IVb.CrossRefGoogle Scholar
[16] Fink, R. W., Jopson, R. C., Mark, Hans, and Swift, C. D. 1966, Rev. Mod. Phys. 38, 526.Google Scholar
[17] Allen, C. W.: 1963, Astrophysical Quantities, The Athlone Press, London.Google Scholar
[18] Bell, K. L. and Kingston, A. E.: 1967, Monthly Notices Roy. Astron. Soc. 136, 241.Google Scholar
[19] Gorenstein, P., Kellogg, E. M., and Gursky, H.: 1969, Astrophys. J., 156, 315 Google Scholar
[20] Merzbacher, E., and Lewis, H. W.: 1958, Handbuch der Physik, Vol. 34, 166.Google Scholar
[21] Bates, D. R. and Griffing, G.: 1953, Proc. Phys. Soc. A66, 961.Google Scholar
[22] Comstock, G. M., Fan, C. Y., and Simpson, J. A.: 1969, Astrophys. J. 155, 609.Google Scholar
[23] Bethe, H. A. and Salpeter, E. E.: 1957, Quantum Mechanics of One-and-Two Electron Atoms Springer-Verlag, Berlin, Sec. IVa.CrossRefGoogle Scholar
[24] Bates, D. R. and Dalgarno, A.: 1953 Proc. Phys. Soc. A66 972.Google Scholar
[25] Hiskes, J. R.: 1965, Phys. Rev. 137A, 361.Google Scholar
[26] Bearden, J. A.: 1967, Rev. Mod. Phys. 39, 78.CrossRefGoogle Scholar
[27] Bearden, J. A.: 1967, Rev. Mod. Phys. 39, 125.CrossRefGoogle Scholar