We first used the pterodactyls pipeline to search for planets around 1,374 Sun-like stars that are younger than 1 billion years old in data from the Transiting Exoplanet Survey Satellite (TESS). Young stars tend to be more active than older stars, making planet searches a bit challenging. 2/8 - ThreadSky

kevinkhu.bsky.social • 58 days ago

We first used the pterodactyls pipeline to search for planets around 1,374 Sun-like stars that are younger than 1 billion years old in data from the Transiting Exoplanet Survey Satellite (TESS). Young stars tend to be more active than older stars, making planet searches a bit challenging. 2/8

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kevinkhu.bsky.social•58 days ago

Planets were statistically validated using the triceratops code. We recovered and validated 16 planets. There are more planet candidates in the target sample we looked at, but we were unable to recover them at high confidence. 3/8

kevinkhu.bsky.social•58 days ago

All known transiting young planets are represented in this period vs radius plot, including planets our pipeline recovered (circles), did not recover (plus signs), and planets TESS did not observe (diamonds). This is compared to the older planet population contours. Colors indicate planet age. 4/8

kevinkhu.bsky.social•58 days ago

We ran our planet occurrence rate machinery and what did we find? At the youngest ages, planets between 1.8 and 10 Earth radii are not very common. Then they become much more common at intermediate ages. For old stars, these planets become uncommon again, but smaller planets are about as common. 5/8

kevinkhu.bsky.social•58 days ago

What does this mean? Well, between young and intermediate ages, tidal migration could be bringing planets in from further out. When the planets get closer to the host star, they lose their atmospheres, leaving few larger planets and a bunch of big rocks. 6/8

kevinkhu.bsky.social•58 days ago

To summarize our results, Abagail Minnich has made this incredible video! A hypothetical planetary system is depicted evolving through time, showing tidal migration, atmospheric mass loss, and compositional evolution. 7/8

exotides.bsky.social•58 days ago

*Nooo, little b came too close to its star. *

Great work.

kevinkhu.bsky.social•58 days ago

Congrats to the incredible team led by Rachel Fernandes! @gbergsten.bsky.social, @gijsmulders.bsky.social, @pascucci.bsky.social, @aussiastronomer.bsky.social, @kierstenboley.bsky.social, @ericmamajek.bsky.social, @sabinastro.bsky.social, @sakhee-space.bsky.social, @astrokarpoor.bsky.social 8/8

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