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Observations and Models for Red Giants with Unusual Dust

Published online by Cambridge University Press:  12 April 2016

Ian Griffin ,
C.J. Skinner  and
B.R. Whitmore
Ian Griffin
Affiliation:
Dept. Physics & Astronomy, University CollegeLondon, Gower Street, London WCIE 6BT
C.J. Skinner
Affiliation:
Dept. Physics & Astronomy, University CollegeLondon, Gower Street, London WCIE 6BT
B.R. Whitmore
Affiliation:
School Mathematical Science, Queen Mary College, Mile End Road, London El 4NS

Extract

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We present near IR (H, K and L band) medium resolution (ƛ/Δƛ ∼ 600) spectra for a selection of 9 red giants which have previously been shown to exhibit anomalous dust emission as characterised by their IRAS LRS spectra. The objects observed (during UKIRT and AAT service time) include Carbon stars whose LRS spectra show the 9.7μm silicate feature and also M stars whose LRS spectra display an 11.3μm feature similar to that usually associated with emission from SiC dust grains.

Type
5. Chromospheres, Winds and Mass Loss
Information
International Astronomical Union Colloquium , Volume 106: Evolution of Peculiar Red Giant Stars , 1989 , pp. 367
Copyright
Copyright © Cambridge University Press 1989