Last before our lunch break we have Elisabeth Newton about Exoplanets in THYME.
Old planet populations can be modelled, while young planets give us a snapshot instead. How do we do this on a population levels?
Two tools to determine stellar ages, we can use rotation and Li. The rotation increases, while Li decreases. This is what they do in their THYME collab, because these two probes are the most reliable in stellar associations. #exoplanets5
As a case study, we look at TOI-2048 with lots of stellar variability and rotation, so it is a young star in Group X (a young cluster). So they looked for new members in Gaia. They tried to determine the age of group X from rotation (I guess assuming their are all of the same age given they’re in a cluster??) The age of group X is consistent with NGC smth.
There is also a planet so they modelled the lightcurve components.
What about size? The youngest planets are VERY large. #exoplanets5
TOI-1227 b is a planet currently Jupiter sized but will shrink. So no hot Jupiter future for this one, but sub-Neptune. Not everyone can be as hot as a hot Jupiter right? 🙃
There are some other results I shall not toot about 🤓
Young planets in clusters enable accurate mass determinations!
#exoplanets5
Bibiana Prinoth (moved!)