[Astronomy seminar] Astronomy seminar TODAY 10:30 FC61: Katja Poppenhäger

[Astronomy seminar announcements]

On 2019-09-23 10:25, Alexis Brandeker wrote:
> Astronomy seminar
>
> Time & location: Friday September 27, 10:30 in FC61
>
> Speaker: Katja Poppenhäger (AIP, Potsdam)
>
> Title: Understanding the evolution of star-exoplanet systems
>
> Abstract:
> Stars and their exoplanets evolve together over billions of years, just
> like our own solar system.  Many known exoplanetary systems have planets
> orbiting their host stars at much closer distances than we observe in
> the solar system, with orbital periods of only a few days. In such
> systems one  expects  the  star  and  its close-in  planet to
> interact  through  tidal and magnetic forces, tying their evolution
> together.  These interactions can give us insights into fundamental
> properties of star- planet systems which are hard to constrain
> otherwise:  the time scale over which close-in planets spiral into the
> star, the evolution of stellar activity, and the amount of atmospheric
> evaporation and the habitability for all planets in a system with a
> close-in planet.  Gaia and other telescopes have now opened up new
> pathways to measure how stars and planets interact with each other.  I
> will present new approaches to test for planet-induced influences on
> stars through wide binary systems, motivate a new look at stellar
> magnetic activity measurements,  and discuss how planetary atmospheres
> can evaporate over the lifetime of exoplanets.
>
> Also TODAY 23/9 @ 13:00: PhD Defence Anders Nyholm in FB42
>
> 4/10 (Fri) @ 10:30: Tim Dietrich (Amsterdam)
> 11/10 (Fri) @ 10:30: *POSTPONED TO 2020-02-07* John Airy (SU Science
> Education)
> 18/10 (Fri) @ 10:30: Marta Silva (Oslo ITA)
> 24-26/10 (Thu-Sat): Astronomdagarna
>
>
> All welcome! Alexis Brandeker (Astronomy seminar organiser 2019)
>
>
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