Many of the recently discovered Earth-like exoplanets are hosted by M and F stars, stars that emit intense UVC, especially during a flare.
space weather
Posted inAstrochemistry, Astrogeology, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Gaia - Planetary Perspectives, Imaging & Spectroscopy, Magnetic Fields, Electromagnetism, bioelectricity,, Space Weather & Heliophysics, Status Report
Connections Have Been Discovered Between Earth’s Oxygen And Its Magnetic Field
For 540 million years, the ebb and flow in the strength of Earth’s magnetic field has correlated with fluctuations in atmospheric oxygen, according to a newly released analysis by NASA […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Habitable Zones, Space Weather & Heliophysics, Status Report, TRAPPIST-1
Hubble’s Multi-Year Search for Exospheres in the TRAPPIST-1 System Reveals Frequent Microflares
Ly-α observations provide a powerful probe of stellar activity and atmospheric escape in exoplanetary systems.
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Space Weather & Heliophysics, Status Report
Why M-dwarf Flares Have Limited Impact On sub-Neptunes’ Atmospheric Evaporation
M-type stars are prime targets for exoplanet searches within their habitable zones (HZs). M-type stars also exhibit significant magnetic flaring activity, especially during the first billion years, which can potentially […]
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Space Weather & Heliophysics, Status Report, Stellar Cartography
Flare Frequency In M dwarfs Belonging To Young Moving Groups
Context. M stars are preferred targets for studying terrestrial exoplanets, for which we hope to obtain their atmosphere spectra in the next decade.
Posted inAstrochemistry, Astrogeology, Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Space Weather & Heliophysics, Status Report, Stellar Cartography
Revisiting The Li Abundances Of Stars With And Without Detected Planets From The High Resolution Spectroscopy
Whether the presence of planets affects the lithium (Li) abundance of their host stars is still an open question.
Posted inExoplanets, -moons, -comets, Habitable Zones, Radiation, Space Weather & Heliophysics, Status Report
Far-ultraviolet Flares and Variability of the Young M dwarf AU Mic: a Non-detection of Planet c in Transit at Lyman-alpha
Atmospheric escape’s potential to shape the exoplanet population motivates detailed observations of systems actively undergoing escape.
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Magnetic Fields, Electromagnetism, bioelectricity,, Space Weather & Heliophysics, Status Report
Impacts Of Tidal Locking On Magnetospheric Energy Input To Exoplanet Atmospheres
We investigate the effect of planetary corotation on energy dissipation within the magnetosphere-ionosphere system of exoplanets.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biophysics, Extinction events, Gaia - Planetary Perspectives, Habitable Zones, Press Release, Radiation, Space Weather & Heliophysics
The Most Extreme Solar Storm Hit Earth In 12350 BC
New research uncovers the strongest solar event ever detected — rewriting our understanding of space weather and radiocarbon dating.
Posted inAstrogeology, Atmospheres, Climate, Weather, Gaia - Planetary Perspectives, Habitable Zones, Press Release, Space Weather & Heliophysics
Sunlight Unlocks Secrets As To How Earth Works
When our planet and the incoming sunlight align just right, stunning phenomena such as rainbows and halos can occur. More often, sunlight – or shortwave radiation – interacts with Earth […]