Laser spectroscopy of interstellar molecules

Details Laser spectroscopy of interstellar molecules Laser spectroscopy of interstellar molecules

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007msl..confe..85r&link_type=abstract

"Molecules in Space and Laboratory, meeting held in Paris, France, May 14-18, 2007. Editors: J.L. Lemaire, F. Combes. ISBN: 9782

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One of the oldest mysteries in molecular spectroscopy is the identity of the carriers of the diffuse interstellar bands (DIBs). Related to this problem is the unknown identity of the carriers of emission lines in the Red Rectangle, a nearby proto-planetary nebula, known as the Red Rectangle Bands (RRBs). Our strategy to uncover the carriers of the DIBs and RRBs includes a combination of gas phase spectroscopy and detailed observation. Our laboratory studies have led us to the discovery of a radical species, produced by a discharge in benzene, absorbing coincident with the strong DIB at 4760Å. This is the second such species from a benzene discharge found to be coincident with a DIB, the other being coincident with the strong DIB at 4428Å. The identity of the 4760Å band carrier is discussed in terms of the carbon chain and aromatic paradigms.

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