Project Details
Projekt
Short- and Long-Period Planets around Evolved Stars
Subject Area
Astrophysics and Astronomy
Term
since 2020
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 446158929
More than one hundred planets have been identified around giant stars in recent years, and thus the occurrence rate of planets in the period range of 1 to 3 years is reasonably well determined. However, there are only very few planets with periods of the order of weeks or longer than 10 years.We propose to specifically search for planets with short and long periods around giant stars, via radial velocity follow-up of TESS transiting planet candidates around evolved host stars on one side and via continued long-term radial velocity monitoring of systems which show indications for planets with periods of the order of 10 to 30 years on the other side. This will dramatically improve the occurrence rates for this so-far uncharted parameter space, and inform planet population synthesis studies. Furthermore, it will help to address differences in planet formation as a function of stellar mass (since the evolved samples are typically more massive than main-sequence samples), and also provide constraints on the evolution of planetary orbits under the influence of tides and stellar evolution by comparing main-sequence and evolved samples with the help of simulations.
DFG Programme
Priority Programmes
Subproject of
SPP 1992:
Exploring the diversity of extrasolar planets
