solar-type stars Archives

Mass Constraints For The K2-223 System Planets: An Ultra-short-period sub-Earth, A Short-period Super-Earth, And A Tentative Long-period Giant Planet

by Keith CowingSeptember 6, 2026September 6, 2026

[astro-ph.EP] We present mass constraints of two short-period, terrestrial-sized planets transiting K2-223, based on high-precision radial velocity measurements from HARPS-N and ESPRESSO, as well as a tentative indication of an […]

Variation of the magnetic activity with the rotation period of stars for all three models. Figure adopted from Vashishth et al. (2023). -- astro-ph.SR

Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Radiation, Space Weather & Heliophysics, Status Report

Modelling The Rotation Dependence Of Cycle Variability In Sun-like Stars: Answering Why Only Slowly Rotating Stars Produce Grand Minima

by Keith CowingFebruary 21, 2024February 20, 2024

The Sun and solar-type stars exhibit irregular cyclic variations in their magnetic activity over long time scales.

solar-type stars

Mass Constraints For The K2-223 System Planets: An Ultra-short-period sub-Earth, A Short-period Super-Earth, And A Tentative Long-period Giant Planet

Modelling The Rotation Dependence Of Cycle Variability In Sun-like Stars: Answering Why Only Slowly Rotating Stars Produce Grand Minima

The Emergence Of Life In The Light Of Evolution

ReactionAtlas: Ab Origine Exploration Of Chemical Reaction Networks With Machine Learning

Mass Constraints For The K2-223 System Planets: An Ultra-short-period sub-Earth, A Short-period Super-Earth, And A Tentative Long-period Giant Planet

Double Gravity-Assist Rendezvous Trajectory to Halley’s Comet Using Deep-Space Low Thrust

Photometric Characterization Of Near-Earth Asteroids: Rotation, Taxonomy, And Candidate Evidence For Internal Cohesion