Other
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.1066l&link_type=abstract
HST Proposal ID #1066
Other
Hst Proposal Id #1066
Scientific paper
Observations of the C2 molecule in interstellar diffuse clouds are based on the Phillips near-infrared system. The ultraviolet D-X (lambda ~2310 A) and F-X (lambda ~1341 A) transitions should provide detectable C2 lines on HRS echelle spectra for lines-of-sight for which Phillips system lines are essentially undetectable. Observations of C2 will be attempted for line of sight containing rather little H2 (log N(H2) <~ 20.6). The D-X and F-X bands transitions will be calibrated against the Phillips system through observations of zeta Oph. The relation between C2, H2, and other abundant molecules will be interpreted using cloud models and thorough chemical reaction networks. Rotational excitation will also be measured and interpreted.
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