The M dwarf star GJ 436 hosts a warm-Neptune that is losing substantial amount of atmosphere, which is then shaped by the interactions with the wind of the host star. […]
space weather
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Press Release, Space Weather & Heliophysics
A Young Super-Earth Orbiting Red Dwarf AU Microscopii Is Evaporating
A young planet whirling around a petulant red dwarf star is changing in unpredictable ways orbit-by-orbit. It is so close to its parent star that it experiences a consistent, torrential […]
Posted inExoplanets, -moons, -comets, Habitable Zones, Space Weather & Heliophysics, Status Report
Large-scale Structures In The Stellar Wind Of Fast-rotating Stars Spawned By The Presence Of Earth-like Planets
Forming planets around young, fast-rotating solar-like stars are exposed to an intense X-ray/extreme ultraviolet radiation field and strongly magnetized stellar winds, as a consequence of the high magnetic activity of […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Space Weather & Heliophysics, Status Report
The Space Weather Around The Exoplanet GJ 436b
The space environment in which planets are embedded depends mainly on the host star and impacts the evolution of the planetary atmosphere. The quiet M dwarf GJ 436 hosts a […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Space Weather & Heliophysics, Status Report
Possible Detection of A Flare-associated Coronal Mass Ejection on A M-dwarf
We here report a probable detection of a stellar coronal mass ejection (CME) in active M dwarf KIC 8093473 by performing an analysis on its time resolved X-ray spectra observed […]
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biophysics, Exoplanets, -moons, -comets, Habitable Zones, Radiation, Space Weather & Heliophysics, Water/Hycean Worlds & Oceanography
MHD Study Of Extreme Space Weather Conditions For Exoplanets With Earth-like Magnetospheres: On Habitability Conditions And Radio-emission
The present study aims at characterizing the habitability conditions of exoplanets with an Earth-like magnetosphere inside the habitable zone of M stars and F stars like tau Boo, caused by […]
Posted inPress Release, Space Weather & Heliophysics
Our Sun Is A Normal Star After All
With data from the Kepler (NASA), Gaia (ESA) and SOHO (NASA/ESA) satellites, a team, led by Instituto de Astrofísica e Ciências do Espaço (IA2) researcher ngela Santos, seems to have […]
Posted inAstrogeology, Biogeochemical Cycles & Geobiology, Biophysics, Habitable Zones, Press Release, Space Weather & Heliophysics
Do Earth-like Exoplanets Have Magnetic Fields? Far-off Radio Signal Is Promising Sign
Earth’s magnetic field does more than keep everyone’s compass needles pointed in the same direction. It also helps preserve Earth’s sliver of life-sustaining atmosphere by deflecting high energy particles and […]
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Habitable Zones, Space Weather & Heliophysics, Status Report
Impact of Changing Stellar and Planetary Magnetic Fields on (Exo)planetary Environments and Atmospheric Mass Loss
The magnetic activity of a star — which modulates the stellar wind outflow — shapes the immediate environments of orbiting planets and induces atmospheric loss thereby impacting their habitability.
Posted inExoplanets, -moons, -comets, Habitable Zones, Space Weather & Heliophysics, Status Report
Characterisation Of Stellar Activity Of M dwarfs. I. Long-timescale variability In A Large Sample And Detection Of New Cycles
M dwarfs are active stars that exhibit variability in chromospheric emission and photometry at short and long timescales, including long cycles that are related to dynamo processes.