We re-examine the expected yield of Gaia astrometric planet detections using updated models for giant-planet occurrence, the local stellar population, and Gaia’s demonstrated astrometric precision.
Stellar Cartography
Posted inAstrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Origin & Evolution of Life, Status Report, Stellar Cartography
Abiogenesis On Different Star Types; a Dissipative Photochemical Perspective
The thermodynamic dissipation theory for the origin of life asserts a thermodynamic imperative for the origin of life, suggesting that the fundamental molecules of life originated as self-organized molecular photon […]
Posted inAstrogeology, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Status Report, Stellar Cartography
The Impact Of Supermassive Black Holes On Exoplanet Habitability: I. Spanning The Natural Mass Range
While the influence of supermassive black hole (SMBH) activity on habitability has garnered attention, the specific effects of active galactic nuclei (AGN) winds, particularly ultrafast outflows (UFOs), on planetary atmospheres […]
Posted inAstrochemistry, Astrogeology, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
Planetary Architectures Under The Influence Of A Stellar Binary
Context. The presence of a stellar companion can strongly influence the architecture and long-term stability of planetary systems.
Posted inAstronomy & Telescopes, Imaging & Spectroscopy, Interstellar, Status Report, Stellar Cartography
A Revised Three-dimensional Stellar Cartography: Visualization Of The Local Group of Galaxies
A new three-dimensional reconstruction of the Local Group (142 confirmed members) and nearest galaxies (6 members) is presented, addressing the lack of up-to-date visual representations that reflect the rapid pace […]
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
Using Stellar Spectral Energy Distributions to Measure Exoplanet Parameters
The ability to make accurate determinations of planetary parameters is inextricably linked to measuring physical parameters of the host star, in particular the stellar radius.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
Multiplicity Of Stellar Systems In The Solar Neighbourhood, Wide Binaries, And Planet-hosting Stars
This doctoral thesis studies stellar multiplicity in the solar neighborhood (d < 10 pc) and in systems hosting planets (d < 100 pc).
Posted inAstrogeology, Exoplanets, -moons, -comets, Gas Giants, Ice Giant, Status Report, Stellar Cartography
The Coupled Tidal Evolution of the Moons and Spins of Warm Exoplanets
Context: The Solar System giant planets harbour a wide variety of moons. Moons around exoplanets are plausibly similarly abundant, even though most of them are likely too small to be […]
Posted inExoplanets, -moons, -comets, Habitable Zones, Press Release, Stellar Cartography
Ageing Stars May Be Destroying Their Closest Planets
Ageing stars may be destroying the giant planets orbiting closest to them, new research shows – offering a glimpse into the possible fate of the likes of Jupiter and Saturn […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Gaia Mission, Habitable Zones, Imaging & Spectroscopy, Status Report, Stellar Cartography
Very High Precision Astrometry for Exoplanets and Dark Matter with the Habitable Worlds Observatory
Astrometry, one of the oldest branches of astronomy, has been revolutionized by missions like Hipparcos and especially Gaia, which mapped billions of stars with extraordinary precision.