Twin Exoplanets Ride Inward Together, Rewriting Hot-Jupiter Origins
TL;DR Summary
Astronomers using the James Webb Space Telescope studied TOI-1130, a system where a hot Jupiter (TOI-1130c) hosts a close companion mini-Neptune (TOI-1130b). The pair likely formed beyond the frost line and migrated inward together into a 2:1 resonance, with TOI-1130b showing a heavy atmosphere rich in water vapor, CO2, SO2 and methane. This rare architecture suggests hot Jupiters can form with companions and migrate as a pair, challenging prior ideas about planetary formation.
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- JWST Unveils A High Mean Molecular Weight Atmosphere For Mini-Neptune TOI-1130b: Evidence For Formation Beyond The Water Ice Line astrobiology.com
- Migrating planets theory becomes clearer after UniSQ research The Chronicle | The Chronicle
- JWST unmasks the gas dwarf: How two rare planets travelled 190 light years together Open Access Government
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