X-ray splinter session on Cool Stars 16

Welcome to the homepage of the X-ray splinter session at the 'Cool Stars 16' conference, held 29 Aug - 2 Sep 2010, Seattle, Washington. The objective of this session is to provide a forum for a discussion of recent developments and new topics in the field of stellar X-ray astronomy.

We focus on topics that go beyond X-ray emission from solar-type dynamo action and cover X-ray emitting coronae at the edges of the 'magnetic activity strip', high-energy aspects in star formation and young stars and the interaction of stars and planets. These themes highlight newly discovered X-ray phenomena and debated topics that are likely of interest for a broader community including non X-ray scientists. We hope to bring together people working in these fields and anticipate vital dicussions.

Topics of this session

  • The hottest and coolest magnetically active stars
  • X-ray emission and jets from young stars
  • X-rays, Stars & Planets





Time:  Monday, August 30, 2:00-4:45pm

Program

14:00-14:05 --- Welcome
14:05-14:20 --- J. Robrade - Magnetic activity - the hot and cool end of the main sequence
14:20-14:35 --- B. Stelzer - X-rays from brown dwarfs
--- Discussion

14:40-14:55 --- J. Kastner - MWL observations of young accreting stellar systems
14:55-15:10 --- P.C. Schneider -- Jets and Herbig Haro objects
--- Discussion

15:15-15:30 --- Break

15:30-15:40 --- K.Poppenhaeger - To be or not to be - Star-Planet Interaction in X-rays
15:40-15:50 --- S. Wolk - Possible X-ray Detection of Star-Planet Interaction in HD 189733
15:50-16:00 --- J. Sanz-Forcada - Planets and X-rays: a radiation diet
--- Discussion

16:05-16:30 --- Great Discussion led by Thomas Ayres

16:30-16:45 --- Summary, outlook - eROSITA and cool stars
.

The hottest and coolest magnetically active stars

Fast rotating stars with a thin outer convective layer, magnetic Ap stars and fully convective stars or brown dwarfs with very cool atmospheres are not simply scaled cases of solar-like activity. A wealth of new X-ray data has been gathered in the regime of borderline X-ray activity with implications reaching from magnetic field generation in the stellar interior up to the energy release in the outer atmospheric layers.

X-ray emission and jets from young stars

Deep X-ray imaging and spectroscopic studies, often at multiple wavelengths, have e.g. revealed the existence of stellar X-ray jets and allowed the study of outflow and accretion phenomena to an unprecedented detail. These are important for star-formation scenarios and link stars to the field of jet formation and X-ray generation in collimated outflows.

X-rays, stars & planets

An actual topic with a range of new science themes like star-planet interaction or planet evaporation. High energy emission influencing the evolution of planetary systems and the interaction of stars with their planets, especially close and massive ones, is a new and fast evolving field where more comprehensive data has become available.




Conveners:
Jan Robrade (jrobrade@hs.uni-hamburg.de), P.C. Schneider (cschneider@hs.uni-hamburg.de), Katja Poppenhaeger (kpoppenhaeger@hs.uni-hamburg.de) and J.H.M.M. Schmitt.