Interstellar proteins and the discovery of a new absorption feature at lambda = 2800 A

Details Interstellar proteins and the discovery of a new absorption feature at lambda = 2800 A Interstellar proteins and the discovery of a new absorption feature at lambda = 2800 A

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..94..223k&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 94, no. 1, July 1983, p. 223-229.

Astronomy and Astrophysics

Astrophysics

11

Absorption Spectra, Interstellar Extinction, Interstellar Matter, Proteins, Satellite Observation, Ultraviolet Absorption, Early Stars, Granular Materials, Graphite, Iue, Stellar Spectrophotometry

Scientific paper

In order to check the presence of biogenic materials in interstellar grains, the spectra of three early-type, heavily reddened stars recorded by the IUE were examined. These stars showed comparatively weak absorption at 2200 A, minimizing the effect of graphite grains. A broad absorption feature centered on 2800 A is discovered in HD 14250 and interpreted to be due to the amino acid tryptophan. Comparison of the spectrum with that of the calculated extinction behavior of graphite spheres of radii 0.02 microns suggests that the latter are not responsible for the observed spectrum.

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