[astro-ph.EP] Hot Neptunes are close-in exoplanets that occupy a sparsely populated region of parameter space known as the “hot-Neptune desert”.
hot Neptune
Posted inAstrogeology, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Ice Giant, Nomenclature, Systematics, Natural History, Status Report
(Re)-Defining Planets — the Fundamental Plane of Planets
6000+ exoplanets are now detected using various techniques, with estimates of billions of planets existing in our Galaxy alone.
Posted inExoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
The TOI-1117 Multi-planetary System: 3 Sub-Neptunes, 1 In Both The Neptunian Desert And Radius Valley
We present the discovery of three sub-Neptune planets around TOI-1117, a Sun-like star with mass 0.97±0.02M⊙, radius 1.05±0.03R⊙, age 4.42±1.50 Gyr and effective temperature 5635±62 K. Light curves from TESS […]
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Two Hot sub-Neptunes On A Close-in, eccentric orbit (TOI-5800 b) and a farther-out, circular orbit (TOI-5817 b)
Neptune-sized exoplanets are key targets for atmospheric studies, yet their formation and evolution remain poorly understood due to their diverse characteristics and limited sample size.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
HST Transmission Spectra Of The Hot-Neptune HD 219666 b: Detection Of Water And The Challenge Of Constraining Both Water And Methane With HST
Although Neptunian-sized (2 – 5 REarth) planets appear to be extremely common in the Galaxy, many mysteries remain about their overall nature. To date, only eleven Neptunian-sized planets have had […]
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Gas Giants, Ice Giant, Icy Worlds, Imaging & Spectroscopy, Status Report
Highly Reflective White Clouds On The Western Dayside Of An Exo-Neptune
Highly-irradiated gas giant exoplanets are predicted to show circulation patterns dominated by day-to-night heat transport and a spatial distribution of clouds that is driven by advection and local heating.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release
Hot Neptune TOI-3261 b Is In A Tight Orbit Around Its Host Star
The Discovery A Neptune-sized planet, TOI-3261 b, makes a scorchingly close orbit around its host star. Only the fourth object of its kind ever found, the planet could reveal clues […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release
Weird New Planet Retained An Atmosphere Despite Its Nearby Star’s Relentless Radiation
A rare exoplanet that should have been stripped down to bare rock by its nearby host star’s intense radiation somehow grew a puffy atmosphere instead—the latest in a string of […]