Advertisement

Astrophysics and Space Science

, Volume 34, Issue 1, pp 33–38 | Cite as

Diffuse interstellar band formation in dense clouds

  • Theodore P. SnowJr.
  • Judith G. Cohen
Article

Abstract

Measurements of the strengths of the diffuse interstellar bands at 4430, 5780 and 5797 Å show that the bands tend to be week with respect to extinction in dense interstellar clouds. Data on 10 stars in the ϱ Ophiuchi cloud complex show further that the diffuse band-producing efficiency of the grains decreases systematically with increasing grain size. It is concluded that the diffuse bands are not formed in the mantles which accrete on the grains in interstellar clouds, but that they could be produced in the cores of grains or in some molecular species.

Keywords

Grain Size Molecular Species Band Formation Dense Cloud Interstellar Cloud 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Aannestad, P. A. and Purcell, E. M.: 1973,Ann. Rev. Astron. Astrophys. 11, 309.Google Scholar
  2. Bromage, G. E. and Nandy, K.: 1973,Astron. Astrophys. 26, 17.Google Scholar
  3. Carrasco, L., Strom, S. E., and Strom, K. M.: 1973,Astrophys. J. 182, 95.Google Scholar
  4. Cohen, J. G.: 1973,Astrophys. J. 184, 149.Google Scholar
  5. Coyne, G. V., Gehrels, T., and Serkowski, K.: 1974,Astron. J. 79, 581.Google Scholar
  6. Deeming, T. J. and Walker, G. A. H.: 1967,Z. Astrophys. 66, 175.Google Scholar
  7. Herzberg, G.: 1967, in H. van Woerden (ed.), ‘Radio Astronomy and the Galactic System’,IAU Symp. 31, 91.Google Scholar
  8. Merrill, P. W., Sanford, R. F., Wilson, O. C., and Burwell, C. G.: 1937,Astrophys. J. 86, 274.Google Scholar
  9. Routly, P. M. and Spitzer, L.: 1952,Astrophys. J. 115, 227.Google Scholar
  10. Smith, W. H.: 1974, private communication.Google Scholar
  11. Snow, T. P.: 1973,Astron. J. 78, 913.Google Scholar
  12. Strom, S. E.: 1974, private communication.Google Scholar
  13. Walborn, N. R.: 1973,Astrophys. J. Letters 180, L35.Google Scholar
  14. Wallerstein, G. and Goldsmith, D.: 1974,Astrophys. J. 187, 237.Google Scholar
  15. Wampler, E. J.: 1966,Astrophys J. 144, 921.Google Scholar
  16. Wilson, R.: 1964,Publ. Roy. Obs. Edinburgh 4, 67.Google Scholar

Copyright information

© D. Reidel Publishing Company 1975

Authors and Affiliations

  • Theodore P. SnowJr.
    • 1
  • Judith G. Cohen
    • 2
  1. 1.Princeton University ObservatoryPrincetonU.S.A.
  2. 2.Kitt Peak National ObservatoryTucsonU.S.A.

Personalised recommendations