IRAS observations of R Cor Bor stars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Infrared Astronomy Satellite, Spaceborne Astronomy, Stellar Evolution, Stellar Spectrophotometry, Stellar Temperature, Variable Stars, Cosmic Dust, Red Giant Stars, Stellar Envelopes

Scientific paper

The IRAS observations of R Cr B, SU Tau and V 348 Sgr indicate the existence of a cool dust component of temperature about 30 K in R Cr B and SU Tau and less than or equal to 100 K in V 348 Sgr, in addition to the hot dust. It is suggested that this cool dust shell is a remnant of the stage when these stars were red giants for the first time. Although R Cr B was observed by IRAS during a visual light minimum no significant IR flux increase was apparent.

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