HR 5110 superflare: an interbinary flare identified?

Details HR 5110 superflare: an interbinary flare identified? HR 5110 superflare: an interbinary flare identified?

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.275..129g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 275, Issue 1, pp. 129-142.

Astronomy and Astrophysics

Astronomy

23

Binaries: Spectroscopic, Stars: Flare, Stars: Individual: Hr 5110, X-Rays: Stars

Scientific paper

A 73-ks pointed ROSAT observation revealed the RS CVn system HR 5110 to be in an outburst lasting over 3d. Although the rise to outburst was not observed, over this 3-d period the PSPC count rate decayed to one-half of its initial value, which itself was some 4-5 times larger than the all-sky survey value. The count rate for the simultaneous WFC observations remained virtually constant throughout the pointing but was about a factor of 3.6 higher than its value during the all-sky survey. Calculations based on the spectral parameters show that a simple flare mechanism and standard two-ribbon flare models cannot explain the observations satisfactorily. This is the first time that such departures from a two-ribbon flare model have been identified unambiguously, and instead an interbinary flare is suggested as the cause of the outburst.

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