A new flare star member candidate in the Pleiades cluster

Details A new flare star member candidate in the Pleiades cluster A new flare star member candidate in the Pleiades cluster

2011-08-31

arxiv.org/abs/1108.6278v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

8 pages, 7 figures

Scientific paper

We present a new flare star, which was discovered during our survey on a selected field at the edge of the Pleiades cluster. The field was observed in the period 2007 - 2010 with three different CCD-cameras at the University Observatory Jena with telescopes from 25 to 90 cm. The flare duration is almost one hour with an amplitude in the R-band of about 1.08 mag. The location of the flare star in a color-magnitude diagram is consistent with age and distance of the Pleiades. In the optical PSF of the flare star there are two 2MASS objects (unresolved in most images in the optical Jena PSF), so it is not yet known which one of them is responsible for this flare. The BVRIJHK colors yield spectral types of M1 and M2 with extinction being A_V=0.231+/-0.024 mag and A_V=0.266+/-0.020 for those two stars, consistent with the Pleiades cluster.

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