NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The outer layers of cool, non-Mira carbon starsThe outer layers and near circumstellar envelope (CSE) of a typical carbon star have been studied using available data from theoretical and empirical models. An attempt is made to match the density-velocity structure of the photosphere-chromosphere region to values from the radio CO observations, which arise from the outer CSE. It is concluded that the stellar atmosphere includes a relatively thin high-temperature region close to hydrostatic equilibrium and a much more extended cooler region of outflowing gas and dust. To extend the outer photosphere and chromosphere to match the mass loss density appears to require an injection of energy and momentum by some mechanism rather close to the stellar surface.
Document ID
19920029033
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Johnson, H. R.
(Niels Bohr Institute Copenhagen, Denmark)
Date Acquired
August 15, 2013
Publication Date
September 1, 1991
Publication Information
Publication: Astronomy and Astrophysics
Volume: 249
Issue: 2 Se
ISSN: 0004-6361
Subject Category
Astrophysics
Accession Number
92A11657
Funding Number(s)
CONTRACT_GRANT: NAG5-182
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available