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Fluorescence efficiencies of the A-X and B-X systems of CO 2 + in comets

Abstract

Fluorescence models of the A-X and B-X band systems of CO 2 + have been constructed using molecular parameters available in literature. The models have been compared with the spectra of comets Austin (1989c1) and P/Giacobini-Zinner. From the best fit, the fluorescence efficiencies of the A-X and B-X band systems have been derived.

References

  1. A’Hearn, M. F., Synthetic spectra of C2 in comets, Astrophys. J., 219, 768–772, 1978.

  2. A’Hearn, M. F., J. T. Ohlmacher, and D. Schleicher, A high resolution solar atlas for fluorescence calculations, Technical Report: TR AP83-044, Department of Physics and Astronomy, University of Maryland, 1983.

  3. Ajello, J., Emission cross section of CO2 by electron impact in the interval 1260–4500 A. II., J. Chem. Phys., 55, 3169–3176, 1971.

  4. Barth, C. A., C. W. Hord, J. B. Pearce, K. K. Kelly, G. P. Anderson, and A. I. Stewart, Mariner 6 and 7 ultraviolet spectrometer experiment: Upper atmosphere data, J. Geophys. Res., 76, 2213–2227, 1971.

  5. Cochran, W. D., C. R. O’Dell, C. O. Miller, A. L. Cochran, C. B. Opal, D. Valk, and E. S. Barker, The near ultraviolet spectra of comets P/Brorsen-Metcalf and Austin, in Workshop on Observations of Recent Comets (1990), edited by W. F. Huebner, J. Rahe, P. A. Wehinger, and I. Konno, Albuquerque, New Mexico, June 15–16, 1990.

  6. Feldman, P. D., K. B. Fournier, V. P. Grinin, and A. M. Zvereva, The abundance of ammonia in comet P/Halley derived from ultraviolet spectrophotometry of NH by ASTRON and IUE, Astrophys. J., 404, 348–355, 1993.

  7. Festou, M. C., P. D. Feldman, and H. A. Weaver, The ultraviolet bands of the CO+2 ion in comets, Astrophys. J., 256, 331–338, 1982.

  8. Gauyacq, D., C. Larcher, and J. Rostas, The emission spectrum of the CO+2 ion: rovibronic analysis of the A2 u -X2 g band system, Can. J. Phys., 57, 1634–1649, 1979.

  9. Herran, C., F. Arqueros, and J. Campos, Lifetime of electronic states of CO+2, J. Mol. Spectro., 97, 244–247, 1983.

  10. Huber, K. P. and G. Herzberg, Molecular Spectra and Molecular Structure, IV. Constants of Diatomic Molecules, 716pp., Van Nostrand Reinhold Company, 1979.

  11. Kawaguchi, K., C. Yamada, and E. Hirota, Diode laser spectroscopy of the CO+2 ?3 band using magnetic field modulation of the discharge plasma, J. Chem. Phys., 82, 1174–1177, 1985.

  12. Kim, S. J., M. F. A’Hearn, and W. D. Cochran, NH emissions in comets: Fluorescence vs Collision, Icarus, 77, 98–108, 1989.

  13. Konno, I., Atomic and molecular abundances in comets, Ph.D. Thesis, Arizona State University, 1987.

  14. McCallum, J. C. and R. W. Nicholls, Franck-Condon factors and related quantities for the Fox-Duffendack Barker (A2 u -X2 g ) and ultraviolet doublet (B2 u+-X2 g ) band systems of CO+2, J. Phys. B: Atom. Molec. Phys., 4, 1096–2001, 1971.

  15. McCallum, J. C. and R. W. Nicholls, Relative intensity measurements on the Fox-Duffendack Barker (A2 u -X2 g ) and the ultraviolet doublet (B2 u+-X2 g ) band systems of CO+2, J. Phys. B: Atom. Molec. Phys., 5, 1417–1426, 1972.

  16. Mrozowski, S., On the 2 u ? 2 g bands of CO+2. Part I, Phys. Rev., 60, 730–738, 1941.

  17. Mrozowski, S., On the 2 u ? 2 g bands of CO+2. Part II, Phys. Rev., 62, 270–279, 1942.

  18. Mrozowski, S., On the 2 u ? 2 g bands of CO+2. Part III, Phys. Rev., 72, 682–698, 1947.

  19. O’Dell, C. R., C. O. Miller, A. L. Cochran, W. D. Cochran, C. B. Opal, and E. S. Barker, New ultraviolet spectroscopic features found in comet Brorsen-Metcalf (1989o), Astrophys. J., 368, 616–621, 1990.

  20. Rohrer, F. and F. Stuhl, NH (a1 ? X3 ?) emission from the gas-phase photolysis of HN3, Chem. Phys. Lett., 111, 234–237, 1984.

  21. Rostas, J. and R. P. Tuckett, The emission spectrum of CO2+: the B2 u+(000)-X2 g (000) band, rotationally cooled in a molecular beam, J. Mol. Spectro., 96, 77–86, 1982.

  22. Smith, W. H., Lifetimes and total transition probabilities for NH, SiH, and SiD, J. Chem. Phys., 51, 520–525, 1969.

  23. Valk, J. H., C. R. O’Dell, A. L. Cochran, W. D. Cochran, and C. B. Opal, Near-ultraviolet spectroscopy of comet Austin (1989c1), Astrophys. J., 388, 621–632, 1992.

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Correspondence to Sang Joon Kim.

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Keywords

  • Band System
  • Rotational Line
  • Excitation Rate
  • Band Head
  • Short Wavelength Range