Stephan Stock

Stephan Stock  (Germany)

sstock @

Multiplanetary Systems in the Carmenes Survey

The CARMENES (Calar Alto high-Resolution search for M dwarfs with Exoearths with Near-infrared and optical Échelle Spectrographs) survey targets around 300 M dwarfs. It is specifically designed to detect Earth-sized planets in the habitable zone of those stars. Many M dwarfs tend to be rather active, therefore it is challenging to detect Earth-sized planets around those stars. One goal of this project is to robustly identify the planetary signal in the radial velocity data of the host star using statistical methods. From the dynamical point of view, many M dwarf multi-planetary systems tend to be tightly packed, e.g., Trappist-1, GJ 581, YZ Ceti.
The main goal of this project is to investigate multi-planetary systems found by the CARMENES survey in detail using dynamical simulations. This can provide additional constraints on further parameters as well as additional information about the dynamical status of the system (stable vs. unstable systems, resonant vs. non-resonant systems, co-planar vs. inclined systems, prograde vs. retrograde orbits).
These informations are essential in order to asses possible formation scenarios of those planetary systems. We use N-body codes and symplectic integrators like Mercury (Chambers, 1999) or SyMBA (Duncan et al., 1998) for the dynamical investigations.

Supervisor:  Sabine Reffert  (LSW)

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