HD 110067 Archives

Cumulative fraction of 350 systems that destabilized within 25 Myr. 99 % of the non-resonant systems with properties consistent with the observations were unstable, as opposed to 11 % of systems initialized in a six-planet resonant chain (via a disk migration simulation). Systems in which only a subset of the planets are captured into a resonant chain were also mostly unstable. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography, TRAPPIST-1

The Six-planet Resonant Chain Of HD 110067

by Keith CowingMay 10, 2024May 10, 2024

HD 110067 is the brightest star known to have six transiting planets. Each adjacent pair of planets has a period ratio that is nearly equal to a ratio of small […]

Space-based photometry from TESS and CHEOPS of HD 110067. Transits identified for each planet after our analyses are each associated with a different color. a-f, Photometric time series of TESS Sector 23 (a,b, 2-minute cadence), TESS Sector 49 (c,d, 20-second cadence), and CHEOPS (e,f). Red points in a show the reprocessed data affected by scattered light and high levels of sky background. Time units are in TESS Julian Date (TJD ≡ BJD − 2457000), where BJD is the Barycentric Julian Date in units of days. Detrended light curves and the final model are shown in b,d,f. g-l, TESS phase-folded transits of each planet in the system. The transit model and binned photometry are color-coded following the same convention. For HD 110067 b (g) and d (i), CHEOPS photometry is shown atop the TESS photometry with an arbitrary offset for clarity. m, top-down view of the planetary system. Axes show the distance from the central star as a function of the semi-major axis and equilibrium temperature of the planet. -- astro-ph.EP

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

A Resonant Sextuplet Of Sub-Neptunes Transiting The Bright Star HD 110067

by Keith CowingDecember 2, 2023December 2, 2023

Planets with radii between that of the Earth and Neptune (hereafter referred to as sub-Neptunes) are found in close-in orbits around more than half of all Sun-like stars.