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Fossil dust shells around luminous supergiantsThe observed frequency with which infrared excesses appear in F, G, and K supergiants of luminosity class Ia supports the idea that these excesses arise in a 'fossil' circumstellar dust shell that was formed during a prior M-super-giant phase of evolution. The required leftward evolution of the star on the H-R diagram would then imply that the Ledoux, rather than the Schwarzschild, criterion for convective mixing is the correct criterion to use in stellar evolution calculations.
Document ID
19750044782
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Stothers, R.
(NASA Goddard Institute for Space Studies New York, N.Y., United States)
Date Acquired
August 8, 2013
Publication Date
April 1, 1975
Publication Information
Publication: Astrophysical Journal
Volume: 197
Subject Category
Astrophysics
Accession Number
75A28854
Distribution Limits
Public
Copyright
Other

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