Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.4515b&link_type=abstract
American Astronomical Society, 187th AAS Meeting, #45.15; Bulletin of the American Astronomical Society, Vol. 27, p.1350
Astronomy and Astrophysics
Astronomy
Scientific paper
Recent studies have suggested that a two-photon Lyman alpha driven absorption mechanism in H_2 or H_2(+) is responsible for the diffuse interstellar absorption bands. This hypothesis differs radically from previous theories on the origin of the diffuse interstellar bands. In order to test the validity of the H_2(+) hypothesis, a study was undertaken to calculate the exact properties of the H_2(+) spectrum relevant to the proposed two-photon mechanism. Using the Born-Oppenheimer approximation, wave lengths and cross sections for the two-photon mechanism were calculated and compared to the diffuse interstellar absorption spectrum. The results of this study indicate that the H_2(+) spectrum does not match the observed diffuse interstellar band spectrum.
Babb James
Bacon Dave
Dalgarno Alexander
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