X-ray eclipse mapping of AR Lacertae

Details X-ray eclipse mapping of AR Lacertae X-ray eclipse mapping of AR Lacertae

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...350..776w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 350, Feb. 20, 1990, p. 776-795.

Astronomy and Astrophysics

Astrophysics

71

Eclipsing Binary Stars, K Stars, X Ray Binaries, Exosat Satellite, Light Curve, Maximum Entropy Method, Stellar Coronas, Stellar Flares, Stellar Models

Scientific paper

Exosat data of the binary cycle of the eclipsing RS CVn system AR Lac are studied. The data reveal that at energies of less than 1 ke V a factor of 2 intensity modulation is detected and at energies greater than 1 ke V no orbital modulation is observed. The chi-squared and maximum entropy methods are used to model low-energy modulation. The relation between the low-temperature component and height is examined. It is observed that 50 pct of the X-ray flux comes from a surface area covering up to 16 pct of the K star and 25 pct of the G star and that peak coronal pressure is about 100 dyne/sq cm.

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