We present an analysis of a volume-complete sample of 363 mid-to-late M dwarfs within 15 pc of the Sun with masses between 0.1 and 0.3 M⊙ observed by TESS within […]
extrasolar
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, TRAPPIST-1
EDEN Survey: Small Transiting Planet Detection Limits and Constraints on the Occurrence Rates for Late M Dwarfs within 15 pc
Earth-sized exoplanets that transit nearby, late spectral type red dwarfs will be prime targets for atmospheric characterization in the coming decade.
Posted inExoplanets, -moons, -comets, Status Report
A Framework For The Architecture Of Exoplanetary Systems. II. Nature Versus Nurture: Emergent Formation Pathways Of Architecture Classes
In the first paper of this series, we proposed a model-independent framework for characterising the architecture of planetary systems at the system level.
Posted inAstrochemistry, Exoplanets, -moons, -comets, Habitable Zones, Icy Worlds, Meteorites & Asteroids, Status Report, Water/Hycean Worlds & Oceanography
Origin Of Water In The Terrestrial Planets: Insights From Meteorite Data And Planet Formation Models
Water condensed as ice beyond the water snowline, the location in the Sun’s natal gaseous disk where temperatures were below 170 K. As the disk evolved and cooled, the snowline […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
An Earth-sized Planet Around An M5 Dwarf Star At 22 Pc
We report on the discovery of an Earth-sized transiting planet (Rp=1.015±0.051R⊕) in a P=4.02 day orbit around K2-415 (EPIC 211414619), an M5V star at 22 pc.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Venus
From Exo-Earths To Exo-Venuses – Flux And Polarization Signatures Of Reflected Light
Terrestrial exoplanets in habitable zones are ubiquitous. It is, however, unknown which have Earth-like or Venus-like climates.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
The Transmission Spectrum Of The Potentially Rocky Planet L 98-59 c
We present observations of the 1.35+/-0.07 Earth-radius planet L 98-59 c using Wide Field Camera~3 on the Hubble Space Telescope. L 98-59 is a nearby (10.6 pc), bright (H=7.4 mag), […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Press Release
Watch Exoplanets Dance Around Their Home Star
In 2008, HR8799 was the first extrasolar planetary system ever directly imaged. Now, the famed system stars in its very own video.
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
YunMa: Enabling Spectral Retrievals of Exoplanetary Clouds
In this paper, we present YunMa, a model which enables the study of cloud microphysics and radiative properties in exoplanetary atmospheres.
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Habitable Zones, Plant Biology, Status Report
A New Definition of Exoplanet Habitability: Introducing the Photosynthetic Habitable Zone
It may be possible to detect biosignatures of photosynthesis in an exoplanet’s atmosphere. However, such a detection would likely require a dedicated study, occupying a large amount of telescope time.