The search for life beyond Earth will depend on detecting faint signatures in the atmospheres of potentially habitable exoplanets.
astro-ph.EP
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
Super-Earths And Mini-Neptunes Follow Different Orbital Period-eccentricity Relations
Many exoplanets have been observed with radius sizes between that of Earth and that of Neptune and are thus classified into two groups: super-earths (SEs) and mini-neptunes (MNs).
Posted inAstrochemistry, Astrogeology, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Comets and Asteroids, Icy Worlds, Imaging & Spectroscopy, Interstellar, Status Report
Dust Colour, Phase Behaviour, And Monte Carlo Modelling Of Interstellar Comet 3I/ATLAS From 4 au Pre- to 4 au Post-Perihelion
We report multi-band photometric imaging observations and Monte Carlo dust tail modelling of the interstellar comet 3I/ATLAS covering a wide range of heliocentric distances, from about 4 au pre-perihelion to […]
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Status Report
Effect Of Tidal Gravity And Planetary Rotation On The Retrieved Atmospheric Abundances Of Close-in Exoplanets
Most modern atmospheric retrievals adopt the simplifying assumption that the planetary atmosphere endures no planetary rotation and stellar tidal effect.
Posted inAstrogeology, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Ice Giant, Lava / magma ocean / Volcanic Worlds, Neptune, Status Report, Uranus, Water/Hycean Worlds & Oceanography
Ice Giants Revisited: Uranus And Neptune As Magma Ocean Worlds
Uranus and Neptune are commonly interpreted as volatile-rich “ice giants”, an assumption that underpins most interior models.
Posted inAstrochemistry, Astrogeology, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Enceladus, Habitable Zones, Icy Worlds, Status Report
Tidal Rock Grinding As A Source Of H2 On Enceladus
The Solar System hosts multiple potentially habitable environments, including the subsurface ocean beneath the icy crust of Saturn’s moon Enceladus.
Posted inAstrogeology, Lava / magma ocean / Volcanic Worlds, Moon, Origin & Evolution of Life, Status Report
Resonant Lunar Tides Of Earth’s Core And Basal Magma Ocean
Earth’s magnetic field is generated by fluid motion in the liquid-metal core and has been active for billions of year.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
COUNTESS I: A Uniformly Vetted Catalog of Known and New Transiting Exoplanets in the TESS Northern Continuous Viewing Zone
The Transiting Exoplanet Survey Satellite (TESS) has transformed the study of nearby exoplanetary systems; however, its nominal observing strategy limits sensitivity to planets with orbital periods shorter than ∼10 days […]
Posted inAstrogeology, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Desert Worlds, Exoplanets, -moons, -comets, Habitable Zones, Icy Worlds, Mars, Status Report
Coupling Dynamical Accretion And Chemical Differentiation: A Unified Framework For Earth-Mars Diversity
The distinct physical and geochemical differences between Earth and Mars provide fundamental constraints on terrestrial planet formation, yet a self-consistent framework linking dynamical and chemical aspects remains elusive.
Posted inAstrochemistry, Atmospheres, Climate, Weather, Beta Pictoris, Exoplanets, -moons, -comets, Icy Worlds, Imaging & Spectroscopy, Interstellar, Status Report
13CO And Potential Variability In β Pictoris b With GRAVITY+
The 12CO/13CO ratio was introduced as an indicator for where in the disk a planet has formed. Previously a lower value compared to the host star’s was suggested to show […]