Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-09-09
Astronomy and Astrophysics
Astrophysics
Accepted MNRAS, 7 pages
Scientific paper
10.1111/j.1365-2966.2004.08388.x
We present the results of a search of the XMM-Newton public data archive for stellar X-ray flares. We find eight flaring sources for which we identify 7 optical counterparts. Three of these sources have distance estimates which allow us to determine their luminosities. Based on the decay time of the flares and their luminosity we derive loop half-lengths of ~2-7x10^10 cm and emission measures of ~10^54 cm^-3: these are similar to values derived for other stellar flaring sources. One of the stars shows two flares in close succession. We discuss the likelihood of this double event being either sympathetic or homologous in nature. A comparison to a pair of similar flares on the Sun suggests that homology is the more likely process driving the flare event.
Foley Carl
Ramsay Gavin
Trenholme Duncan
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