Two component X-ray emission from RS CVn binaries

Details Two component X-ray emission from RS CVn binaries Two component X-ray emission from RS CVn binaries

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980stin...8115935s&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Binary Stars, Bremsstrahlung, Line Spectra, Solid State Devices, Spectrometers, Stellar Spectra, X Ray Astronomy, Cold Plasmas, High Temperature Plasmas, X Ray Spectra

Scientific paper

A summary of results from the solid state spectrometer on the Einstein Observatory for 7 RS CVn binaries is presented. The spectra of all require two emission components, evidenced by line emission characteristic of plasma at 4 to 8 x 10 to the 6th power and bremsstrahlung characteristic of 20 to 100 x 10 to the 6th power K. The data are interpreted in terms of magnetic coronal loops similar to those seen on the Sun, although with different characteristic parameters. The emission regions could be defined by separate magnetic structures. For pressure less than approximately 10 dynes/sq cm the low temperature plasma would be confined within the stellar radii, while the high temperature plasma would, for the synchronous close binaries, fill the binary orbits. However, for loop pressures exceeding 100 dynes/sq cm, the high temperature components would also be confined to within the stellar radii, in loops covering only small fractions of the stellar surfaces. While the radio properties and the occurrence of X-ray flares suggest the larger emission regions, the observations of time variations leave the ambiguity unresolved.

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