Secular Resonance Archives

Graph of the semimajor axis and eccentricity of the final terrestrial planets in the simulations of Table 1. Note that the majority of the planets formed or reached their final orbits in the range of 0.45 – 0.65 au. -- astro-ph.EP

Secular Resonances in Planet-Hosting Binary Stars. II. Application to Terrestrial Planet Formation

by Keith CowingOctober 8, 2025October 8, 2025

Continuing our study of the effects of secular resonances on the formation of terrestrial planets in moderately close binary stars, we present here the results of an extensive numerical simulations […]

Left: Relationship between companion planet semimajor axis ratios (axes) and maximum inclination induced on candidate inner planet via resonance (color bar). Planets 1 and 2 were initialized with a 4◦ mutual inclination Right: Effects of the variation of the masses of the outer two planets at four different sets of semimajor axis ratios shown on the leftmost panel corresponding to the four different qualitative regions shown: A) ain and a1 are too close and a2 too far away for the system to enter resonance; B) a1 and a2 are such that the inner planet is in resonance with the outer two at J2 = 0; C) a1 and a2 are such that the inner planet is in resonance with the outer two for some particular J2 ̸= 0; D) a1 and a2 are such that the inner planet will never be in resonance with the outer two for any of the J2 values the star will explore. The green stars mark the mass ratio assumed in the left panel. -- astro-ph.EP

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

More Likely Than You Think: Inclination-Driving Secular Resonances are Common in Known Exoplanet Systems

by Keith CowingJune 14, 2024June 14, 2024

Multi-planet systems face significant challenges to detection. For example, further orbiting planets have reduced signal-to-noise ratio in radial velocity detection methods, and small mutual inclinations between planets can prevent them […]

Secular Resonance

Secular Resonances in Planet-Hosting Binary Stars. II. Application to Terrestrial Planet Formation

More Likely Than You Think: Inclination-Driving Secular Resonances are Common in Known Exoplanet Systems

Tricorder Tech: New Handheld Device Maps Chemical Composition Using Infrared Light

No Statistically Significant Evidence For A Correlation Between Stellar And planetary Composition

Water Planet Recon: How Accurately Can We Measure Earth Ocean’s Deepest Point?

Webb Reveals A Stunning Panorama Of Star Formation

Deep Learning of SHERLOC Raman Spectra For Facilitating Mars Astromaterial Identification