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Anders Johansen 🪨🌍🇺🇦

@astroandersj.bsky.social
142 followers 156 following 18 posts

Theoretical astrophysicist, with expertise in planet formation. Head of Planet Formation Group at University of Copenhagen / Lund University. Opinions my own. sites.google.com/view/planet-format…

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Anders Johansen 🪨🌍🇺🇦 @astroandersj.bsky.social · 25/02/2025
So the radius gap may be primordial and photoevaporation, in our view, plays mainly a role of actually filling in the gap region with planets completely or partially stripped of their gas envelope.
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Anders Johansen 🪨🌍🇺🇦 @astroandersj.bsky.social · 25/02/2025
This gives these nice 'crocodile' plots where the radius gap is clearly visible out to 0.5 astronomical units (AU) or so.
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Anders Johansen 🪨🌍🇺🇦 @astroandersj.bsky.social · 25/02/2025
The radius valley describes the lack of planets with radii around 1.5-2 times Earth's radius. Here a famous plot of the radius gap from Fulton et al. (2017).
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Anders Johansen 🪨🌍🇺🇦 @astroandersj.bsky.social · 06/10/2023
A great community note from that other site.
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