GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star.
Science (New York, N.Y.) 374:6572 (2021) 1271-1275
Abstract:
Ultrashort-period (USP) exoplanets have orbital periods shorter than 1 day. Precise masses and radii of USP exoplanets could provide constraints on their unknown formation and evolution processes. We report the detection and characterization of the USP planet GJ 367b using high-precision photometry and radial velocity observations. GJ 367b orbits a bright (V-band magnitude of 10.2), nearby, and red (M-type) dwarf star every 7.7 hours. GJ 367b has a radius of 0.718 ± 0.054 Earth-radii and a mass of 0.546 ± 0.078 Earth-masses, making it a sub-Earth planet. The corresponding bulk density is 8.106 ± 2.165 grams per cubic centimeter—close to that of iron. An interior structure model predicts that the planet has an iron core radius fraction of 86 ± 5%, similar to that of Mercury’s interior.The young HD 73583 (TOI-560) planetary system: Two 10-M$_\oplus$ mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf
(2021)
About the modelling of the SED for the inner boundary of protoplanetary discs at the lower stellar mass regime
Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 506:4 (2021) 5361-5372
Hot planets around cool stars – two short-period mini-Neptunes transiting the late K-dwarf TOI-1260
Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 505:4 (2021) 4684-4701
TOI-220 b : a warm sub-Neptune discovered by TESS
Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 505:3 (2021) 3361-3379