compositional links between
and cold Jupiters
Schlecker et al., 2020a,
also check out the press release (available in English and German).
In our recent paper, we test what planet formation has to say about a peculiar trend that has been found in exoplanet demographics: around solar-type stars, inner super-Earths and outer giant planets tend to occur together.
This challenges some established planet formation theories that predicted an anti-correlation of these planet types.
Our synthetic population of 1000 multi-planet systems supports the observed trend, but with important caveats.
When we associate our initial conditions with the composition of the resulting planets, we see a quite interesting link: Depending on the initial solid mass, we either get isolated, icy super-Earths or rocky ones that have a cold Jupiter companion. This gives rise to the testable hypothesis that high-density inner super-Earths are proxies for cold Jupiters in the same system. A confirmation of this prediction would constrain central open questions in contemporary planet formation theory, ranging from efficiency of pebble accretion to planet migration behavior.