Identification of the 2,200 A interstellar absorption feature

Details Identification of the 2,200 A interstellar absorption feature Identification of the 2,200 A interstellar absorption feature

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977natur.270..323h&link_type=abstract

Nature, vol. 270, Nov. 24, 1977, p. 323, 324.

Computer Science

36

Absorption Spectra, Interstellar Extinction, Red Shift, Ultraviolet Spectra, Cyclic Hydrocarbons, Isomers, Nitrogen Compounds

Scientific paper

A broad absorption feature centered on the wavelength of 2,200 A with a half-width of about 300 A which appears in the spectra of reddened stars is considered. The band is identified as representing the integrated effect of a set of bicyclic compounds, each with the empirical formula C8H6N2. It is pointed out that such nitrogenated structures could form in stellar mass flows. The isomers considered include cinnoline, quinazoline, quinoxaline, phthalazine, and 1,5 naphthyridine.

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