Evidence for a carbon-rich dust cloud in front of HD 193793

Details Evidence for a carbon-rich dust cloud in front of HD 193793 Evidence for a carbon-rich dust cloud in front of HD 193793

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234..129k&link_type=abstract

Astrophysical Journal, Part 1, vol. 234, Nov. 15, 1979, p. 129-132.

Astronomy and Astrophysics

Astrophysics

4

Graphite, Hot Stars, Interstellar Extinction, Interstellar Matter, Stellar Winds, Ultraviolet Photometry, Visual Photometry, Wavelengths

Scientific paper

The wavelength dependence of the interstellar extinction toward HD 193793 is shown to be anomalous. Although radiative transfer effects could play a role, it is shown that relatively small graphite grains forming in the stellar wind can explain the observations if the particles are slowed down by the interstellar medium at a distance of less than about 10 million solar radii from the star.

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