Flare Stars In Pleiades Research Articles

On two possible groups of flare stars in Pleiades

The correlation between the magnitude of the proper motion and the mean frequency of flares for flare stars in the Pleiades cluster region is discussed. The magority of them are physical members of this star cluster. It is shown that there exist probably two groups of flare stars which differ each other by their parameters, in particular by the magnitude of proper motions. A possible explanation of this phenomenon is suggested.

Slow flare in Pleiades

In the course of observations of Pleiades on the 40'' Schmidt telescope of Byurakan Observatory, one slow and two rapid flares were detected in star No. 103. The rise time to the maximum of the flare was ~40 min and the total duration was about 5 h. The brightness magnitudes and photographs of the flare are shown. A statistical analysis of a number of pre-maximum images of flare stars in Pleiades and Orion, taken with different exposures, was carried out. The slow flare stars in Orion and Pleiades are compared. (auth)