HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica

• Published in: Monthly Notices of the Royal Astronomical Society
• Main Authors: Dransfield, Georgina, Dévora Pajares, Martín, Lissauer, Jack J.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Oxford University Press 2022
• Subjects: Planets and satellites: detection; Planets and satellites: dynamical evolution and stability; Planets and satellites: fundamental parameters; Webb; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/10481/76580; https://doi.org/10.1093/mnras/stac1383

We report on the disco v ery and characterization of three planets orbiting the F8 star HD 28109, which sits comfortably in TESS ’s continuous viewing zone. The two outer planets have periods of 56 . 0067 ±0 . 0003 d and 84 . 2597 + 0 . 0010 −0 . 0008 d, which implies a period ratio very close to th...