NDLI: High temperature structure in cool binary stars

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High temperature structure in cool binary stars

Content Provider	NASA Technical Reports Server (NTRS)
Author	Dupree, A. K. Hanson, G. J. Brickhouse, Nancy S.
Copyright Year	1995
Description	Strong high temperature emission lines in the EUVE spectra of binary stars containing cool components (Alpha Aur (Capella), 44 iota Boo, Lambda And, and VY Ari) provide the basis to define reliably the differential emission measure of hot plasma. The emission measure distributions for the short-period (P less than or equal to 13 d) binary systems show a high temperature enhancement over a relatively narrow temperature region similar to that originally found in Capella (Dupree et al. 1993). The emission measure distributions of rapidly rotating single stars 31 Com and AB Dor also contain a local enhancement of the emission measure although at different temperatures and width from Capella, suggesting that the enhancement in these objects may be characteristic of rapid rotation of a stellar corona. This feature might be identified with a (polar) active region, although its density and absolute size are unknown; in the binaries Capella and VY Ari, the feature is narrow and it may arise from an interaction region between the components.
File Size	325347
Page Count	5
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19960007142
Archival Resource Key	ark:/13960/t0jt4ks0w
Language	English
Publisher Date	1995-08-01
Access Restriction	Open
Subject Keyword	Astrophysics Stellar Spectra High Temperature Plasmas Cool Stars Spaceborne Astronomy Hydrogen Extreme Ultraviolet Explorer Satellite Abundance Helium Stellar Coronas Stellar Atmospheres Atmospheric Temperature Emission Spectra Binary Stars Stellar Rotation Plasma Radiation Extreme Ultraviolet Radiation Ultraviolet Astronomy Polar Regions Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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