TOI-1227 Archives

Top: Same as Figure 3, but for TIC 80127634, which is a G star that exhibits high amplitude variations that is used for the water loss simulations. Left: Orbit architecture of a hypothetical Earth-like planet in a circular orbit within the HZ of TIC 80127634. The black circle shows the simulated planet orbit. The light shaded region shows the CHZ and the dark shaded region shows the larger bounds of the OHZ. Right: Percent change in the incident flux received by the hypothetical Earth-like planet. -- astro-ph.EP

Exoplanets, -moons, -comets, Habitable Zones, Space Weather & Heliophysics, Status Report, Stellar Cartography

Planetary Habitability Under The Light Of A Rapidly Changing Star

by Keith CowingNovember 27, 2025

Planetary atmospheric energy budgets primarily depend on stellar incident flux. However, stellar variability can have major consequences for the evolution of planetary climates.

Sky positions of exoplanet-hosting stars projected on Molleweide map. HZS are denoted by yellow-green circles, while the remaining population of exoplanets is represented by gray circles. The studied sample of 84 HZS, located within 220 pc of the Sun, is represented by crossed yellow-green circles. The three high-density HZS located near the galactic plane are labeled 1, 2 and 3 in white. The colorbar represents the stellar density, i.e., the number of stars having G ≥ 15 within a radius of 5 arcmin. -- astro-ph.HE

Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Habitable Zones, Imaging & Spectroscopy, Status Report, Stellar Cartography, Water/Hycean Worlds & Oceanography

The 10 pc Neighborhood of Habitable Zone Exoplanetary Systems: Threat Assessment from Stellar Encounters & Supernovae

by Keith CowingOctober 31, 2024October 31, 2024

The habitability of a planet is influenced by both its parent star and the properties of its local stellar neighborhood. Potential threats to habitability from the local stellar environment mainly […]