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Title:
Properties of the chromosphere-corona transition region in Capella
Authors:
Haisch, B. M.; Linsky, J. L.
Affiliation:
AA(Joint Institute for Laboratory Astrophysics, Boulder, Colo.), AB(Joint Institute for Laboratory Astrophysics; National Bureau of Standards, Laboratory Astrophysics Div., Boulder, Colo.)
Publication:
Astrophysical Journal, vol. 205, Apr. 1, 1976, pt. 2, p. L39-L42. (ApJL Homepage)
Publication Date:
04/1976
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Binary Stars, Chromosphere, Coronas, Late Stars, Stellar Spectra, Ultraviolet Spectra, Astronomical Spectroscopy, Line Spectra, Solar Activity, Stellar Mass, Stellar Winds
DOI:
10.1086/182085
Bibliographic Code:
1976ApJ...205L..39H

Abstract

Analysis of recent ultraviolet observations of the Capella binary system (Alpha Aur) indicates a dense geometrically narrow chromosphere-corona transition region in the Capella system primary (G5 III) similar in many respects to a solar active region. An examination of the coronal energy balance, together with the coronal base pressure derived from the line fluxes, predicts a corona with a mean temperature of 1.2 million K and a large stellar wind consistent with observations.

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Physics
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