Living with a Red Dwarf program Archives

The evolution of M dwarf X-ray activity over time. Early M dwarfs are plotted on the left, and mid-late M dwarfs on the right. Lighter-colored error bars indicate when the ‘average’ uncertainty value was applied to a target for fitting purposes. A two-component, segmented linear model was applied to each subset and is plotted. Each subset shows an initial “saturation phase” where high activity levels are sustained for a period of time, before an inflection point is reached. After this, the activity decreases at an accelerated rate. It is worth noting that many studies assume a constant level of activity during the saturation phase, where our fits indicate that a slight decrease occurs. The saturation phase is found last ∼470 Myr for the early M dwarfs and ∼2.1 Gyr for the mid-late M dwarfs. -- astro-ph.EP

Exoplanets, -moons, -comets, Habitable Zones, Radiation, Space Weather & Heliophysics, Status Report, TRAPPIST-1

Living With A Red Dwarf: X-ray, UV, And Ca II Activity-Age Relationships Of M Dwarfs

by Keith CowingOctober 9, 2023October 9, 2023

The vast majority of stars in the nearby stellar neighborhood are M dwarfs. Their low masses and luminosities result in slow rates of nuclear evolution and minimal changes to the […]

Living with a Red Dwarf program

Living With A Red Dwarf: X-ray, UV, And Ca II Activity-Age Relationships Of M Dwarfs

5 Questions About Astrobiology’s Future At NASA

NASA Is Forfeiting Its Global Astrobiology Leadership

Oxidation Of Photochemical Organic Hazes: A Prebiotic Source of Oxygen-Bearing Organics in Titan’s Atmosphere And Early Earth?

Offworld Biotech: Nikon Experimentation Microscope in Orbit (NEMO) (Video)

Paleo-heat Flux Estimates Across Enceladus Derived From Flexural Response Of The Ice Shell