Speaker
Daniel Kröll
(Universität Bonn)
Description
Superbubbles and bubbles in the interstellar medium are formed by winds of massive stars and their supernova explosions. Knowing the properties of these bubbles is key to determine the energy input by stellar groups and its history.
We study the hydrogen structures in the vicinity of the closest OB Association, the Scorpius-Centaurus association at 140 pc distance. We investigate if our model based on the stars of the subgroups and their expected outputs can consistently explain the observed structures. With the HI Galactic All Sky Survey a total coverage of the region with a resolution of 14.4' is available.
We use methods from image processing to find candidate structures in the HI data. Then we use our model of massive-star created structure in the interstellar medium in the 3D position-position-velocity space, and fit our homogeneous spherical shell model to the data.
We describe a first appliecation to the Upper Scorpius subgroup of the OB Association, and indicate how we plan to find similar bubbles along the entire plane of the galaxy and determine their properties.
Author
Daniel Kröll
(Universität Bonn)