Protostars -- Oral Presentation
Radio, X-ray, and infrared variability of Young Stellar Objects
in the Coronet cluster
Jan Forbrich, Max-Planck-Institut fuer Radioastronomie, Bonn (Germany)
Thomas Preibisch, Karl Menten
The Coronet Cluster in the nearby R CrA dark cloud offers the
rare opportunity to study a sample of at least four ``class I'' protostars
as well as one class 0 source plus a Herbig Ae star within a few arcminutes
at a distance of only 150 pc. Most of these sources are detected at
radio, X-ray, and infrared wavelengths and present a diverse view in
radio and X-ray data we report here. We analyzed multi-epoch Very Large
Array (VLA) as well as archival Chandra and XMM-Newton data taken in
1998 and 2000-2003, respectively. Upcoming simultaneous multi-wavelength
radio, X-ray, and near-infrared observations will offer the possibility
to study interconnections and lead to conclusions concerning the underlying
physics. For example, correlations of the variability in hard X-ray and
centimetric radio emission from these sources could lead to new insights
into their coronal processes, while correlations between lower-energy
X-ray and infrared emission could probe accretion activity.