A search for flares and mass ejections on young late-type stars in the open cluster Blanco-1

  title={A search for flares and mass ejections on young late-type stars in the open cluster Blanco-1},
  author={Martin Leitzinger and Petra Odert and Robert Greimel and Heidi Korhonen and E. W. Guenther and Arnold Hanslmeier and Helmut Lammer and Maxim L. Khodachenko},
  journal={Monthly Notices of the Royal Astronomical Society},
We present a search for stellar activity (flares and mass ejections) in a sample of 28 stars in the young open cluster Blanco-1. We use optical spectra obtained with ESO's VIMOS multi-object spectrograph installed on the VLT. From the total observing time of $\sim$ 5 hours, we find four H$\alpha$ flares but no distinct indication of coronal mass ejections (CMEs) on the investigated dK-dM stars. Two flares show "dips" in their light-curves right before their impulsive phases which are similar to… 

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