The soft X-ray spectrum of Capella - Discovery of intense line emission

Details The soft X-ray spectrum of Capella - Discovery of intense line emission The soft X-ray spectrum of Capella - Discovery of intense line emission

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...223l..21c&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 223, July 1, 1978, p. L21-L23. Research supported by the California

Astronomy and Astrophysics

Astronomy

36

Stellar Coronas, Stellar Spectra, X Ray Sources, X Ray Spectra, Bremsstrahlung, Heao, Signal To Noise Ratios, Solar Corona, Stellar Models, X Ray Astronomy

Scientific paper

A soft X-ray spectrum of Capella has been obtained with the HEAO 1 satellite. Only models which include intense line emission at 0.85 keV can adequately explain the data. The spectrum is consistent with emission from an isothermal solar-abundance plasma with a temperature of 10.5 million (+ or - 2.8 million) K. It is also consistent with a blend of temperatures between 4 and 20 million K. The intensity of the X-ray emission is constant over 2 days and similar to the intensity observed by ANS.

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