TOI-178 Archives

Mass-radius relationship of the TOI-178 planets (final posterior), compared with the super-Earth to Mini-Neptune populations for which the mass was derived through RV (Otegi et al. 2020) and TTVs (Hadden & Lithwick 2017; Leleu et al. 2023). The composition lines ‘terrestrial Earth-like’, in solid brown, and pure MgSiO3 ‘rocky’, in dashed brown, are taken from Zeng et al. (2016). -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography

Photo-dynamical Characterisation Of The TOI-178 Resonant Chain

by Keith CowingMay 24, 2024May 24, 2024

The TOI-178 system consists of a nearby late K-dwarf transited by six planets in the super-Earth to mini-Neptune regime, with radii ranging from 1.2 to 2.9 earth radius and orbital […]

Results of the transit injection-and-recovery tests performed on the TESS (upper panel) and CHEOPS (lower panel) data to assess the detectability of potential additional transiting planets in the TOI-178 system. For both panels, the red stars show the locations of the 6 known planets in the system. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Refining The Properties Of The TOI-178 System With CHEOPS And TESS

by Keith CowingAugust 23, 2023August 23, 2023

The TOI-178 system consists of a nearby late K-dwarf transited by six planets in the super-Earth to mini-Neptune regime, with orbital periods between 1.9 and 20.7 days.

Typical time evolution for the four planets of the resonant chain of Kepler-80 (d, e, b, and c) with Q ′ = 0.05 and physical parameters from Table 1. In the top left panel the eccentricities, in the top right panel the mean-motion ratios of adjacent planets, in the bottom left panel the two-body resonant angles and in the bottom right panel the three-body resonant angles. -- astro-ph.EP

Exoplanets, -moons, -comets, Status Report, TRAPPIST-1

Tidal Interactions Shape Period Ratios In Planetary Systems With Three-body Resonant Chains

by Keith CowingAugust 16, 2023

These last years several Systems with Tightly packed Inner Planets in the super-Earth mass regime have been discovered harboring chains of resonances. It is generally believed that planet pairs get […]