We simulate the space environment around AU Microscopii b and the interaction between the magnetized stellar wind with a planetary atmospheric outflow for ambient stellar wind conditions and Coronal Mass […]
Space Weather & Heliophysics
Posted inSpace Weather & Heliophysics
The Mercurial Sun At The heart Of Our solar System
As the powerhouse of our solar system, the Sun’s electromagnetic planetary influences appear contradictory. On the one hand, the Sun for aeons emitted radiation which was “just right” for life […]
Posted inSpace Weather & Heliophysics
Constraints On The History of the Stellar Radiation Environment Of Planets Orbiting Low-mass Stars
We present a study of the relationship between galactic kinematics, flare rates, chromospheric magnetic activity, and rotation periods for a volume-complete, nearly all-sky sample of 219 single stars within 15 […]
Posted inSpace Weather & Heliophysics
The Contribution of M-Dwarf Flares to the Thermal Escape of Potentially Habitable Planet Atmospheres
The habitability of planets around M dwarfs (≲0.5M⊙) can be affected by the XUV (X rays + extreme UV) emission of these stars, with flares occasionally increasing the XUV flux […]
Posted inSpace Weather & Heliophysics
MHD Study of Planetary Magnetospheric Response During Extreme Solar Wind Conditions: Earth and Exoplanet Magnetospheres Applications
Context: The stellar wind and the interplanetary magnetic field modify the topology of planetary magnetospheres. Consequently, the hazardous effect of the direct exposition to the stellar wind, for example regarding […]
Posted inEpsilon Eridani, Exoplanets, -moons, -comets, Space Weather & Heliophysics
The Crucial Role Of Surface Magnetic Fields For Stellar Dynamos: Epsilon Eridani, 61 Cygni A, and the Sun
Cool main-sequence stars, such as the Sun, have magnetic fields which are generated by an internal dynamo mechanism. In the Sun, the dynamo mechanism produces a balance between the amounts […]
Posted inSpace Weather & Heliophysics
Probable Detection Of An Eruptive Filament From A Superflare On A Solar-type Star
Solar flares are often accompanied by filament/prominence eruptions (∼104 K and ∼1010−11 cm−3), sometimes leading to coronal mass ejections (CMEs) that directly affect the Earth’s environment. `Superflares’ are found on […]
Posted inSpace Weather & Heliophysics
TESS observations of flares and quasi-periodic pulsations from low mass stars and potential impact on exoplanets
We have performed a search for flares and Quasi-Periodic Pulsations (QPPs) from low mass M dwarf stars using TESS 2 min cadence data. We find seven stars which show evidence […]
Posted inSpace Weather & Heliophysics
Superflares Are Less Harmful To Exoplanets Than Previously Thought
Superflares, extreme radiation bursts from stars, have been suspected of causing lasting damage to the atmospheres and thus habitability of exoplanets. A newly published study found evidence that they only […]
Posted inSpace Weather & Heliophysics
Modeling The Corona And XUV Emission Of The Sun And Sun-like Stars
The X-ray and extreme-ultra-violet (EUV) emissions from the low-mass stars significantly affect the evolution of the planetary atmosphere. It is, however, observationally difficult to constrain the stellar high-energy emission because […]