This paper aims to review the diverse range of technosignatures that have been proposed in the literature.
astro-ph.EP
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
An Ultra-Short Period Super-Earth And A Sub-Neptune Orbiting The K Dwarf TOI-4311
We report the discovery and characterisation of the multi-planetary system around TOI-4311, a K dwarf kinematically between the Galactic thick disk and Hercules stream. TOI-4311 hosts an ultra-short-period super-Earth (P∼0.99 […]
Posted inAstrochemistry, Astrogeology, Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Spinning Out Of Focus: The Challenge Of Rotational Line Broadening In Exoplanet Reflection Spectroscopy
Detecting light reflected off the dayside of an exoplanet in high-resolution spectroscopic data has proved to be a notoriously difficult endeavour. Despite several attempts, the faint signal has yet to […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
Planetary Formation Tracks On The Hertzsprung-Russell Diagram: Visualising The Processes Of Giant Planet Growth
The Hertzsprung-Russell diagram (HRD) is central to stellar astrophysics but has rarely been used to interpret planet formation.
Posted inAstrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Habitable Zones, Imaging & Spectroscopy, Status Report, Venus, Water/Hycean Worlds & Oceanography
Seasonal Insolation Variability On Early Venus: Implications For Energy Budget
Venus and Earth are similar in bulk properties yet followed dramatically different climatic trajectories.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Simulation Of The Spin Evolution Of Some Selected Exoplanets And Inferences On Their Climate
In this work, using the simulator VPLanet, we analyze the spin evolution of some selected exoplanets due to the tidal interaction with their host star.
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Measurements And Predictions Of H2 Pressure-broadening Coefficients Of CO2 Absorption Lines For Exoplanet Atmosphere Studies
Accurate and comprehensive H2 pressure-induced broadening data for CO2 infrared lines over a wide temperature range are essential for modeling atmospheric opacity of exoplanets. However, available data are currently limited, […]
![Stellar [α/Fe] versus [Fe/H] for planet-hosting stars analyzed in this work (orange circles). The heat map represents the density of stars from APOGEE DR17 in the [α/M] vs [Fe/H] parameter space for reference. The black line approximately divides the thin and thick disk populations (below and above the line, respectively) as defined by D. H. Weinberg et al. 2019. The red points represent stars from the SPOCS sample from J. M. Brewer et al. (2016). The Sun is over-plotted for reference. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/05/A-Uniform-Determination.png?resize=1200%2C715&ssl=1)
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
A Uniform Determination Of The Bulk Metallicities And Alpha Enrichments Of Confirmed Exoplanet Systems With TRES
We present a uniform spectroscopic characterization of 625 F, G, and K stars hosting 859 confirmed exoplanets using high-resolution archival optical spectra from the Tillinghast Reflector Echelle Spectrograph (TRES).
Posted inAstronomy & Telescopes, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
The First Remotely Detected Biosignature May Not Be the Most Common: Implications for JWST and HWO
The first detected member of a new astronomical class is often not representative of the underlying population, but instead reflects the selection effects of the observing technique that found it.
Posted inAstrogeology, Biosignatures & Paleobiology, Impact events, Mars, Meteorites & Asteroids, Panspermia, Status Report
Could Life Have Been Transferred From Mars To Earth? Laboratory And Computational Simulations Of Martian Ejecta
The study of the origin of life on Earth has been broadened due to panspermia models that suggest that early life may have been transferred between planets.