Entdeckung des riesigen Planeten, der winzige Stern umkreist, fordert Theorien zur Planetenbildung heraus
https://www.nature.com/articles/s41550-025-02552-4
Entdeckung des riesigen Planeten, der winzige Stern umkreist, fordert Theorien zur Planetenbildung heraus
https://www.nature.com/articles/s41550-025-02552-4
2 Kommentare
I’m not sure if this discovery really does challenge current theories. If you look at the reported data, both the ratios M*/Msol and Mp/Mjup are approximately 0.2, which seems to suggest similar formation processes.
Yes, Rp is large for the mass, but we’ve seen other puffed up exoplanets before and has more to do with young age and/or insolation, as far as I’m aware.
“Challenges formation theories” may sound a bit more extreme than it is.. it is just that its unlikely that the planet was formed through core accretion, although not necessarily impossible, especially considering our gaps in knowledge about exact planet-disk interactions in early planet formation. On top of that, core accretion is just one possible formation scenario and as the article itself also points out, it could have formed through gravitational instabilities in the disk instead. The latter is already a well-established planet formation theory, and as the paper states that simulations show this is possible, this planet does not necessarily challenge anything. Having said that, the combination of a planet this massive around such a low mass star still fills a previously empty region of the parameterspace which still makes it a very interesting discovery!