The circumstellar extinction of RY Sagittarii

Details The circumstellar extinction of RY Sagittarii The circumstellar extinction of RY Sagittarii

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..548h&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 94, June-July 1982, p. 548-552.

Astronomy and Astrophysics

Astronomy

27

Interstellar Extinction, R Coronae Borealis Stars, Sagittarius Constellation, Stellar Envelopes, Stellar Spectra, Ultraviolet Astronomy, Variable Stars, Iue, Stellar Spectrophotometry

Scientific paper

In 1979-80, ultraviolet spectrophotometry of RY Sgr was obtained by the International Ultraviolet Explorer (IUE) during the star's recovery from its 1977-78 minimum. The wavelength dependence of the extinction of this R Coronae Borealis-type variable was determined by comparison of spectra obtained at different times but with nearly the same pulsational phase. The measured wavelength dependence is compatible with theoretical predictions of extinction by spherical graphite particles having a radius of 0.043 micron and with the extinction observed for amorphorus carbon smoke.

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