NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Stellar model chromospheres. IV - The formation of the H-epsilon feature in the sun /G2 V/ and Arcturus /K2 III/The formation of the Balmer-series member H-epsilon in the near-red wing of the Ca II H line is discussed for two cases: the sun (H-epsilon absorption profile) and Arcturus (H-epsilon emission profile). It is shown that although the H-epsilon source functions in both stars are dominated by the Balmer-continuum radiation field through photoionizations, the line-formation problems in the two stars are quantitatively different, owing to a substantial difference in the relative importance of the stellar chromosphere temperature inversion as compared with the stellar photosphere.
Document ID
19760029628
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Ayres, T. R.
(Joint Inst. for Lab. Astrophysics Boulder, CO, United States)
Linsky, J. L.
(Joint Institute for Laboratory Astrophysics Boulder, Colo., United States)
Date Acquired
August 8, 2013
Publication Date
October 1, 1975
Publication Information
Publication: Astrophysical Journal
Volume: 201
Subject Category
Astrophysics
Funding Number(s)
CONTRACT_GRANT: NGR-06-003-057
CONTRACT_GRANT: NAS5-23274
Distribution Limits
Public
Copyright
Other
No Preview Available