Resolution of intrinsic fine structure in spectra of narrow diffuse interstellar bands

Details Resolution of intrinsic fine structure in spectra of narrow diffuse interstellar bands Resolution of intrinsic fine structure in spectra of narrow diffuse interstellar bands

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.277l..41s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 277, Issue 2, pp. L41-L43.

Astronomy and Astrophysics

Astronomy

79

Line: Profiles, Techniques: Spectroscopic, Stars: Individual: Musgr, Stars: Individual: Zetaoph, Ism: Molecules

Scientific paper

The first ultra-high-resolution spectra of two of the stronger and narrower diffuse interstellar bands, lambdalambda5797 and 6614, have been recorded along lines of sight towards relatively lightly reddened stars with the Ultra-High-Resolution Facility (UHRF) on the 3.9-m Anglo-Australian Telescope. We have discovered that these bands are composed of partially resolved and wavelength-invariant components which are most readily interpreted in terms of rotational branch structure associated with electronic transitions of gas-phase molecules. These new observational results add considerable weight to the attribution of the lambdalambda5797 and 6614 diffuse bands to transitions in free molecules.

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