“Forbidden” Planet Orbiting Small Star Challenges Gas Giant Formation Theories Based on our current understanding of planet formation, TOI-5205b should not exist; it is a “forbidden” planet. A team of astronomers has discovered an unusual planetary system in which a large gas giant planet orbits
Artist’s conception of a large gas giant planet orbiting a small red dwarf star called TOI-5205. Credit: Image by Katherine Cain, courtesy of the Carnegie Institution for ScienceBased on our current understanding of planet formation, TOI-5205b should not exist; it is a “forbidden” planet.
Artist’s conception of a large gas giant planet orbiting a small red dwarf star called TOI-5205. Until now no gas giant has been found in a planetary system around a low-mass M dwarf like TOI-5205. Credit: Image by Katherine Cain, courtesy of the Carnegie Institution for Science. Kanodia’s team, which included Carnegie’s Anjali Piette, Alan Boss, Johanna Teske, and John Chambers, then confirmed its planetary nature and characterized it using a variety of ground-based instruments and facilities.
The team demonstrated that the planet’s very large transit depth makes it extremely conducive for future observations with the recently launched JWST, which could shed some light on its atmosphere and offer some additional clues about the mystery of its formation.
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