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Observations of Mass Loss and Circumstellar Matter around Cool Carbon Stars

Published online by Cambridge University Press:  25 May 2016

T. Lloyd Evans
T. Lloyd Evans*
Affiliation:
South African Astronomical Observatory, Observatory 7935, South Africa

Abstract

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Spectroscopy and infrared photometry of carbon stars show three distinct forms of circumstellar matter. IRAS 12311-3509 probably has an edge-on disk and the spectrum is dominated by resonance emission from atoms and molecules in the vicinity. The long-period variables V Hya and R Lep are undergoing deep fadings, apparently caused by dust formation around the star, while variable emission from circumstellar gas is seen. The semiregular variable T Mus showed absorption bands from very cool material during an unusual episode in 1994.

Type
Session VIII — Circumstellar Shells
Information
Symposium - International Astronomical Union , Volume 177: The Carbon Star Phenomenon , 2000 , pp. 367 - 375
Copyright
Copyright © Kluwer 2000 

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