Hempel, Marc

Contact Email: mhempel@hs.uni-hamburg.de
Institute: Hamburger Sternwarte Gojenbergsweg 112
D-21029 Hamburg Germany
First Coauthor: Thomas Berghoefer
Institute: Hamburger Sternwarte Gojenbergsweg 112 D-21029 Hamburg Germany
Second Coauthor: Juergen H.M.M. Schmitt
Institute: Hamburger Sternwarte Gojenbergsweg 112 D-21029 Hamburg Germany
Research URL:http://www.hs.uni-hamburg.de/german/persons/hempel.html
Subject Area: Star Formation, Very Young Stars, T-Tauri, H-H Objects
Waveband: X-rays
Technique: Imaging (Direct)
Presentation: Poster Display
Title: Stellar activity in the Gould Belt
Abstract: The Gould Belt is a disk-like structure with an inclination $i\,=\,27^{\circ}$ and an ascending node $l_{\Omega}\,=\,282^{\circ}$ with respect to the galactic plane where an enhancement of young stars and associated interstellar matter can be found. The existence of the Gould Belt as a physical entity is controversial and its formation is as yet puzzling. A cross-correlation of the ROSAT All-Sky Survey sources with the Tycho catalog has shown that a concentration of active stars seems to be associated with the Gould Belt system.
On the basis of the Second ROSAT Source Catalog of Pointed Observations we investigate variations of the distribution of X-ray emitting stars along the Gould Belt. Due to the high sensitivity of the data our in-depth analysis allows to examine the properties of the stars in more detail than in previous studies. We present our results which serve as the basis for forthcoming photometric and spectroscopic observations.