Astrophysics and Space Science

, Volume 32, Issue 2, pp 297–304 | Cite as

Destruction and production of molecules in circumstellar regions of T Tauri stars

  • G. F. Gahm


It is shown that the lifetimes of molecules against photodissociation in circumstellar envelopes of T Tauri stars are very short. The production rates of CO through gas-phase reactions are not sufficient to keep the equilibrium column densities at an observable level. The absence of molecular features reported for this class of stars is qualitatively understood.


Production Rate Photodissociation Molecular Feature Column Density Tauri Star 
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  1. Anders, E.: 1971,Annual Rev. Astron. Astrophys. 9, 1.Google Scholar
  2. Bardsley, J. N. and Junker, B. R.: 1973,Astrophys. J. Letters,183, L 135.Google Scholar
  3. Carruthers, G. R.: 1970, in L. Houziaux and H. E. Butler (eds.), ‘Ultraviolet Stellar Spectra and Ground-Based Observations’,IAU Symp. 36, {pp100}.Google Scholar
  4. Cohen, M.: 1973,Monthly Notices Roy. Astron. Soc. 161, 105.Google Scholar
  5. Cohen, M. and Woolf, N. J.: 1971,Astrophys. J. 169, 543.Google Scholar
  6. Cook, G. R., Metzger, P. H., and Ogawa, M.: 1965,Can. J. Phys. 43, 1706.Google Scholar
  7. Dalgarno, A.: 1974, Paper presented at the meeting for discussion on Astronomy in the Ultraviolet, The Royal Society, London.Google Scholar
  8. Gahm, G. F. and Winnberg, A.: 1971,Astron. Astrophys. 13, 489.Google Scholar
  9. Gahm, G. F., Nordh, H. L., Olofsson, S. G., and Carlborg, N. C. J.: 1974,Astron. Astrophys. 33, 399.Google Scholar
  10. Geisel, S. L.: 1970,Astrophys. J. Letters 161, L 105.Google Scholar
  11. Herbig, G. H.: 1970,Optical Spectroscopy of Interstellar Molecules, Presented at Am. Astron. Soc. Meet., Boulder, Colo.Google Scholar
  12. Hinteregger, H. E.: 1965,Space Science Rev. 4, 461.Google Scholar
  13. Huffman, R. E., Larrabee, J. C., and Tanaka, Y.: 1964,J. Chem. Phys. 40, 2261.Google Scholar
  14. Krauss, M. and Julienne, P. S.: 1973,Astrophys. J. Letters 183, L 139.Google Scholar
  15. Lo, K. Y. and Bechis, K. P.: 1973,Astrophys. J. Letters 185, L 71.Google Scholar
  16. Loren, R. B., Van den Bout, P. A., and Davis, J. H.: 1973,Astrophys. J. Letters 185, L 67.Google Scholar
  17. Lynds, B. T.: 1968, inStars and Stellar Systems, Vol. 7 (ed. by B. M. Middlehurst and L. H. Aller), The University of Chicago Press, p. 119.Google Scholar
  18. Metzger, P. H. and Cook, G. R.: 1964,J. Chem. Phys. 41, 642.Google Scholar
  19. Myer, J. A. and Samson, J. A. R.: 1970,J. Chem. Phys. 52, 266.Google Scholar
  20. Nakayama, T. and Watanabe, K.: 1964,J. Chem. Phys. 40, 558.Google Scholar
  21. Skerbele, A., Meyer, V. D., and Lassettre, E. N.: 1966,J. Chem. Phys. 44, 7069.Google Scholar
  22. Snow, Jr., T. P.: 1973,Publ. Astron. Soc. Pacific 85, 590.Google Scholar
  23. Snow, Jr., T. P. and Wallerstein, G.: 1972,IAU Symp. 52, 65.Google Scholar
  24. Solomon, P. M. and Klemperer, W.: 1972,Astrophys. J. 178, 389.Google Scholar

Copyright information

© D. Reidel Publishing Company 1975

Authors and Affiliations

  • G. F. Gahm
    • 1
  1. 1.Stockholm ObservatorySaltsjöbadenSweden

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