A periodicity in the flaring rate on the eclipsing binary YY Geminorum

Details A periodicity in the flaring rate on the eclipsing binary YY Geminorum A periodicity in the flaring rate on the eclipsing binary YY Geminorum

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...232...83d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 232, no. 1, June 1990, p. 83-88. Research supported by SERC and EEC.

Astronomy and Astrophysics

Astrophysics

6

Eclipsing Binary Stars, Late Stars, Stellar Flares, Periodic Variations, Stochastic Processes

Scientific paper

Five flares were observed on the late-type binary YY Gem in March 1988 during a total monitoring time of 408 min. The flares were unusual in that there is a periodicity in the occurrence of four of them, these being separated by 48 + or - 3 min. Considering the flares to be formed as a stochastic process, it is found that the probability of these events occurring by chance is 0.5 percent. Modeling indicates that for quite reasonable input parameters, the flare periodicity can be explained in terms of filament oscillations. The only requirement is that there should be a filament at these heights where the magnetic field drops inversely proportional to the height.

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