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H2 as a Possible Carrier of the DIBs?

Published online by Cambridge University Press:  21 February 2014

W. Ubachs
W. Ubachs*
Affiliation:
Department of Physics and Astronomy, VU University Amsterdam, De Boelelaan 1081, NL 1081HV Amsterdam, the Netherlands email: w.m.g.ubachs@vu.nl
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Abstract

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In the 1990s the hydrogen molecule, by far the most abundant molecular species in the interstellar medium, has been proposed as a possible carrier of the diffuse interstellar bands. While some remarkable coincidences were found in the rich spectrum of inter-Rydberg transitions of this molecule with DIB-features, both in frequency position as in linewidth, some open issues remained on a required non-linear optical pumping scheme that should explain the population of certain intermediate levels and act as a selection mechanism. Recently a similar scheme has been proposed relating the occurrence of the UV-bump (the ubiquitous 2170 Å extinction feature) to the spectrum of H2, therewith reviving the H2 hypothesis.

Keywords

ISM: moleculesextinctionH2radiation mechanisms: nonthermal
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S297: The Diffuse Interstellar Bands , May 2013 , pp. 375 - 377
Copyright
Copyright © International Astronomical Union 2014 

References

Dahlstrom, J., York, D. G., Welty, D. E., Oka, T., Hobbs, L. M., Johnson, S., Friedman, S. D., Jiang, Z., Rachford, B. L., Sherman, R., Snow, T. P., & Sonnentrucker, P. 2013, ApJ, 773, 41Google Scholar
Hinnen, P. C. & Ubachs, W. 1996a, Chem. Phys. Lett., 240, 351CrossRefGoogle Scholar
Hinnen, P. C. & Ubachs, W. 1996b, Chem. Phys. Lett., 254, 32Google Scholar
Sarre, P. J., Miles, J. R., & Scarrot, S. M. 1995, Science, 269, 674Google Scholar
Snow, T. P. 1995, Chem. Phys. Lett., 245, 639Google Scholar
Sorokin, P. P. & Glownia, J. H. 1995, Chem. Phys. Lett., 234, 1Google Scholar
Sorokin, P. P. & Glownia, J. H. 1997, ApJ, 473, 900CrossRefGoogle Scholar
Sorokin, P. P. & Glownia, J. H. 2005, IBM Research Report RC23641Google Scholar
Sorokin, P. P., Glownia, J. H., & Ubachs, W. 1998, Faraday Disc., 109, 137Google Scholar
Sorokin, P. P. 2013, Opt. Comm., 287, 234CrossRefGoogle Scholar
Ubachs, W., Hinnen, P. C., & Reinhold, E. 1997, ApJL, 496, L93Google Scholar