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Toi 201

All articles tagged with #toi 201

space21 days ago•95 min saved

Brown Dwarf Skews Exoplanet System, Rewriting Planet-Formation Tales

Astronomers using TESS uncover an improbable exoplanet system around TOI-201: a massive brown dwarf TOI-201 c on a long, highly eccentric 2,881‑day orbit coexisting with a warm Jupiter (TOI-201 b) and a rocky super‑Earth (TOI-201 d). The brown dwarf’s gravity reshapes the inner disk, forcing planets to form at the hot inner edge and causing pronounced transit timing variations during close approaches. Mass confirmation marks TOI-201 c as a rare long‑period transiting brown dwarf, and the findings—published in Nature—challenge standard gas‑giant formation models.

via Space|

#brown-dwarf #exoplanets #space

science2 months ago•6 min saved

TOI-201: A Chaotic Exoplanet System Rewrites Planet-Formation Rules

NASA’s TESS data reveal the TOI-201 planetary system, where three bodies have misaligned orbits and strong gravitational interactions that actively reshape their motion. One planet (TOI-201b) shows significant transit timing variations, and an outer ≈15 Jupiter-mass companion influences the system’s dynamics, indicating ongoing orbital reshaping rather than a settled, orderly configuration. The discovery, aided by Antarctica-based long-duration observations, provides a rare glimpse of early planetary evolution and challenges the idea that most systems form in calm, coplanar arrangements.

via The Daily Galaxy|

#exoplanets #orbital-dynamics #science

space2 months ago•74 min saved

TOI-201: A wildly different exoplanet system rewrites planetary rules

NASA’s TESS, with help from the Antarctic ASTEP observatory, found TOI-201 a star about 370 light-years away hosting three very different planets. The system includes a rocky super-Earth (~6 Earth masses) with a 5.8‑day year, plus two gas giants—TOI-201b (about half Jupiter mass, 53‑day orbit) and a much more massive companion (~16 Jupiter masses, ~2,883‑day or ~7.9‑year orbit). The outer planet’s highly inclined, eccentric orbit perturbs the inner planets, causing real-time changes in orbital orientation and transit timing. This results in transits that shift over time and, in about 200 years, may no longer line up to transit the star. The configuration is unlike the common “peas in a pod” pattern and provides new clues about how planetary systems reorganize after formation; the findings were published in Science on April 15.

via Space|

#exoplanets #orbital-dynamics #space