[Astronomy seminar] Astronomy seminar TODAY 10:30 FC61: Carina Persson

[Astronomy seminar announcements]

On 2019-09-09 07:33, Alexis Brandeker wrote:
> Astronomy seminar
>
> Time & location: Friday September 13, 10:30 in FC61
>
> Speaker: Carina Persson (Chalmers)
>
> Title: Exoplanet discovery and characterisation
>
> Abstract:
> Observations during the last decade have uncovered large populations 
> of exoplanets without any counterparts in our own planetary system. 
> This diversity has been one of the major discoveries. One of the most 
> powerful tools in the hunt for new exoplanets is dedicated space 
> mission surveys using the technique of ultra-high precision transit 
> photometry. This allows not only discoveries of new planets, but also 
> measurements of the radius relative to the host star and orbital 
> parameters. By combining the photometry from space missions with 
> ground-based radial velocity measurements, true planet masses and bulk 
> densities can be obtained. But although more than 4000 exoplanets have 
> been detected to date, mainly by the Kepler space telescope, far fewer 
> have been fully characterised and hence the composition and internal 
> structure for most exoplanets are unknown. Only a few tens of 
> Super-Earths have been securely identified. This paucity is related to 
> the faintness of the target stars and a new generation of spacecrafts 
> is therefore specifically targeting bright stars. NASA's TESS 
> spacecraft, launched in April 2018, is an all sky survey mission of 
> short period planets orbiting bright stars which will enable precise 
> follow-up observations. CHEOPS (Characterising Exoplanet Satellite), 
> to be launched 17 Dec 2019, is a European mission equipped with 
> ultra-high precision photometers. The targets will be bright stars 
> already known to host exoplanets and will be observed individually. 
> The European PLATO mission with a launch in 2026 is a next-generation 
> planet-hunter with an emphasis on rocky planets in the habitable zone 
> around solar-type stars. In this talk, I will give an overview of our 
> work at Chalmers and the collaboration with the international KESPRINT 
> consortium.
>
> Other upcoming activites:
>
> 18/9 (Wed) @ 10:00: PhD Defence Emanuel Gafton in FA31
> 20/9 (Fri) @ 10:30: [CANCELLED: John Miller (Oxford)]
> 23/9 (Mon) @ 13:00: PhD Defence Anders Nyholm in FB42
> 27/9 (Fri) @ 10:30: Katja Poppenhaeger (Potsdam)
> 4/10 (Fri) @ 10:30: Tim Dietrich (Amsterdam)
>
> All welcome! Alexis Brandeker (Astronomy seminar organiser 2019)
>
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