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A cool giant with a circumstellar cloudThe IUE spectrum of the star HD 139521, a giant of class G8III is obtained and based on the analysis of the narrow structure of 2795 (k) and 2803 (h) Mg II emission profiles, the existence of a circumstellar cloud around the giant star is assumed. This conclusion is confirmed also by the anomaly of the small observed power of the doublet Mg II emission at 2800. The absorption cores on the peaks of the emission profiles Mg II k and h are mainly of interstellar origin and, only partly, due to self-absorption in the star's chromosphere.
Document ID
19910049867
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1007/BF00643077
Authors
Gurzadian, G. A. (Byurakan Observatory Mount Aragatz, Ussr)
Okhanesian, I. B. (Biurakanskaia Astrofizicheskaia Observatoriia Byurakan, Armenian SSR, United States)
Kondo, Y. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Terzian, Yervant (Cornell University Ithaca, NY, United States)
Perez, Mario R. (NASA Goddard Space Flight Center; IUE Observatory Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
February 1, 1991
Publication Information
Publication: Astrophysics and Space Science
Volume: 176
Issue: 1, Fe
ISSN: 0004-640X
Subject Category
Astrophysics
Report/Patent Number
ISSN: 0004-640X
Accession Number
91A34490
Distribution Limits
Public
Copyright
Other

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