Anomalous extinction and diffuse interstellar bands in the direction of two Be stars

Details Anomalous extinction and diffuse interstellar bands in the direction of two Be stars Anomalous extinction and diffuse interstellar bands in the direction of two Be stars

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...257..745p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 257, no. 2, p. 745-749.

Astronomy and Astrophysics

Astrophysics

3

B Stars, Interstellar Extinction, Interstellar Matter, H I Regions, Molecular Clouds, Optical Properties, Stellar Envelopes

Scientific paper

The Be stars HD 44458 and HD 63462, characterized by peculiar extinction curves, were observed spectroscopically in the range of well-known diffuse interstellar bands - DIBs - (5780, 5797, 6196 and 6203 A). The lack of some of the diffuse features in the observed spectra (or their extreme weakness) may be due to the fact that these bands originate only in diffuse interstellar clouds, whereas a substantial amount of the reddening observed in the spectra of Be stars originates in the circumstellar shell - a medium differing strongly in optical properties from typical interstellar clouds.

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