[astro-ph.EP] Recent observations of V1298-Tau b, a warm sub-Neptune (R=9.85±0.3R⊕, M=13.1±5.3,M⊕, Teq=670K) orbiting a young (10-30Myr) K star, show depleted methane and surprising abundances of CO2 in its atmosphere.
Stellar flare
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Press Release, Radiation, Space Weather & Heliophysics
Young M Dwarfs Flare Activity Model: Towards Better Exoplanetary Atmospheric Characterisation
Context. Stellar flares can significantly influence the atmospheres and habitability of orbiting exoplanets, especially around young and active M dwarfs. Understanding the temporally and spectrally resolved activity of such stars […]
Posted inAstronomy & Telescopes, Habitable Zones, Radiation, Space Weather & Heliophysics, Status Report
Temporal Variation of Flare Occurrence Rates via the Spot Evolution on the Sun and Solar-type Stars
The spot evolution on the Sun and solar-type stars is important for understanding the nature of consequential flaring activity.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biophysics, Exoplanets, -moons, -comets, Habitable Zones, Radiation, Space Weather & Heliophysics, Status Report, Stellar Cartography
The Impact Of Stellar Flares On The Atmospheric Escape of Exoplanets Orbiting M stars I: Insights From The AU Mic System
The X-rays and Extreme Ultraviolet (XUV) emission from M stars can drive the atmospheric escape on planets orbiting them. M stars are also known for their frequent emission of stellar […]
Posted inExoplanets, -moons, -comets, Habitable Zones, Press Release, Radiation, Space Weather & Heliophysics
Extreme Eruption on Young Sun-like Star Signals Savage Environment for Developing Exoplanets
Astronomers have detected an extreme eruption from a young star that became more than a hundred times brighter in only a few hours.
Posted inPress Release, Space Weather & Heliophysics
Stellar Flares Versus Luminosity: XUV-induced Atmospheric Escape And Planetary Habitability
Space weather plays an important role in the evolution of planetary atmospheres. Observations have shown that stellar flares emit energy in a wide energy range (10^30-10^38 ergs), a fraction of […]