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The circumstellar envelopes of F- and G-type supergiants in the Large Magellanic CloudThe outer atmospheres of four F- and G-type supergiants in the LMC are compared with those of their Milky Way counterparts by means of 2.5 and 5.1 A/mm high dispersion Echelle spectra. Na I D line doubling indicates extensive circumstellar envelopes, mass loss rates greater than 0.00001 solar masses/year, and outflow velocities of 10-60 km/sec. The Ca II H and K lines yield new data on extragalactic star chromospheres.
Document ID
19830052026
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hagen, W. (Whitin Observatory Wellesley, MA, United States)
Humphreys, R. M. (Minnesota, University Minneapolis, MN, United States)
Stencel, R. E. (NASA Goddard Space Flight Center Greenbelt, MD; Joint Institute for Laboratory Astrophysics, Boulder, CO, United States)
Date Acquired
August 11, 2013
Publication Date
December 1, 1981
Publication Information
ISSN: 0185-1101
Subject Category
Astrophysics
Accession Number
83A33244
Distribution Limits
Public
Copyright
Other

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