We present the confirmation of TOI-5573 b, a Saturn-sized exoplanet on an 8.79-day orbit around an early M-dwarf (3790 K, 0.59 R⊙, 0.61 M⊙, 12.30 J mag). TOI-5573 b has […]
M-dwarf
Posted inAstrogeology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Lava / magma ocean / Volcanic Worlds, Status Report
Self-limited Tidal Heating And Prolonged Magma Oceans In The L 98-59 System
Rocky exoplanets accessible to characterisation often lie on close-in orbits where tidal heating within their interiors is significant, with the L 98-59 planetary system being a prime example.
Posted inAstrochemistry, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Exoplanets, -moons, -comets, Habitable Zones, Status Report
Lightning Activity On A Tidally Locked Terrestrial Exoplanet In Storm-resolving Simulations For A Range Of Surface Pressures
Cloudy atmospheres produce electric discharges, including lightning. Lightning, in turn, provides sufficient energy to break down air molecules into reactive species and thereby affects the atmospheric composition.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
A Transiting Rocky Super-Earth And A Non-transiting Sub-Neptune Orbiting The M Dwarf TOI-771
The origin and evolution of the sub-Neptune population is a highly debated topic in the exoplanet community.
Posted inAstrogeology, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Space Weather & Heliophysics, Status Report, TRAPPIST-1
MHD Simulations Preliminarily Predict The Habitability and Radio Emission of TRAPPIST-1e
As the closest Earth-like exoplanet within the habitable zone of the M-dwarf star TRAPPIST-1, TRAPPIST-1e exhibits a magnetic field topology that is dependent on space weather conditions.
![[LEFT] Logarithmic ion number density (cm−3 ) distributions of O+ (left column) and O2 + (right column) in the X-Z plane for Kepler-1649 b’s dayside at 0.7 Gyr (top row) and 4.8 Gyrs (bottom row). Coordinates are normalized to the planetary radius RP. [RIGHT] Logarithmic ion number density (cm−3 ) distributions of O+ (left column) and O2 + (right column) in the X-Z plane for Kepler-1649 c’s dayside at 0.7 Gyr (top row) and 4.8 Gyrs (bottom row). Coordinates are normalized to the planetary radius RP. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/04/Evolving-Atmospheric-Ion-Escape.png?resize=1200%2C720&ssl=1)
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Space Weather & Heliophysics, Status Report
Evolving Atmospheric Ion Escape from Kepler-1649 b and c: Power-Law Trends in Atmospheric Loss
Rocky planets orbiting M-dwarf stars are prime targets for characterizing terrestrial atmospheres, yet their long-term evolution under intense stellar winds and high-energy radiation remains poorly understood.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report
Probing the Outskirts of M Dwarf Planetary Systems with a Cycle 1 JWST NIRCam Coronagraphy Survey
The population of giant planets on wide orbits around low-mass M dwarf stars is poorly understood, but the unprecedented sensitivity of JWST NIRCam coronagraphic imaging now provides direct access to […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report
RedDots: Planetary Masses In The GJ1061 System From Planet-planet Interaction
GJ1061 is a very nearby M star hosting three low-mass temperate planets detected from radial velocity variations.
Posted inAstrogeology, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Status Report
TOI-6478 b: A Cold Under-dense Neptune Transiting A Fully Convective M Dwarf From The Thick Disc
Growing numbers of exoplanet detections continue to reveal the diverse nature of planetary systems. Planet formation around late-type M dwarfs is of particular interest.
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Origin & Evolution of Life, Radiation, Status Report
Bioverse: Potentially Observable Exoplanet Biosignature Patterns Under the UV Threshold Hypothesis for the Origin of Life
A wide variety of scenarios for the origin of life have been proposed, with many influencing the prevalence and distribution of biosignatures across exoplanet populations. This relationship suggests these scenarios […]