X-ray observations of Algol

Details X-ray observations of Algol X-ray observations of Algol

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980stin...8023229w&link_type=abstract

Unknown

Astronomy and Astrophysics

Astronomy

Eclipsing Binary Stars, X Ray Sources, X Ray Spectroscopy, Brightness Temperature, Coronas, Eclipses, Flux (Rate), K Stars, Radio Sources (Astronomy), X Ray Spectra

Scientific paper

Observations of Algol using a solid state spectrometer onboard the Einstein Observatory are discussed. Two observations six months apart were made, both during a primary optical eclipse. No corresponding X-ray eclipses were seen. During the second observation the source was flaring and was on average a factor three brighter. The spectrum on both occasions was consistent with a two-component thermal equilibrium model with temperatures of approximately 7.5 and 40 million degrees. Attempts to insert a third component indicate the temperature distribution to be bimodal. Models for the X-ray emission are discussed and it is suggested that the emission most likely originates from an active corona surrounding the K star.

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