As the number of planetary mass objects (PMOs, ⪅13 MJupiter) at wider separation (⪆10 AU) grows, there is emerging evidence that they form differently from their higher-mass brown-dwarf (BD) counterparts.
Brown Dwarfs
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Gaia Mission, Imaging & Spectroscopy, Press Release, Stellar Cartography
Wobbling Stars Reveal Hidden Companions In Gaia Data
New research, published today, uses data collected by ESA’s Gaia spacecraft to confirm the existence of two mysterious celestial objects. Gaia-4b is a ‘Super-Jupiter’ exoplanet, and Gaia-5b a brown dwarf. […]
Posted inBrown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release
Formation of Giant Planets
Giant planets dominate the mass of many planetary systems, including the Solar System, and represent the best-characterized class of extrasolar planets.
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
11 New Transiting Brown Dwarfs and Very Low Mass Stars from TESS
We present the discovery of 11 new transiting brown dwarfs and low-mass M-dwarfs from NASA’s TESS mission: TOI-2844, TOI-3122, TOI-3577, TOI-3755, TOI-4462, TOI-4635, TOI-4737, TOI-4759, TOI-5240, TOI-5467, and TOI-5882.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
The MSG Model For Cloudy Substellar Atmospheres: A Grid Of Self-consistent Substellar Atmosphere Models With Microphysical Cloud Formation
State-of-the-art JWST observations are unveiling unprecedented views into the atmospheres of substellar objects in the infrared, further highlighting the importance of clouds. Current forward models struggle to fit the silicate […]
Posted inAstrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Status Report
Kinetic And Photochemical Disequilibrium In The Potentially Carbon-rich Atmosphere Of The Warm-Jupiter WASP-69b
High-resolution transmission spectroscopy of the warm gas-giant WASP-69b has revealed the presence of H2O, CO, CH4, NH3, and C2H2 in its atmosphere.
![First image of the AO prototype ‘COME–ON’ system taken at 1.52 m telescope of the Observatoire de Haute Provence. γ2 And (a binary star with a 0.5′′ separation) was observed in K band [50]. -- astro-ph.IM](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/01/High-Contrast-Imaging.png?resize=1200%2C719&ssl=1)
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report
High-Contrast Imaging: Hide and Seek with Exoplanets
So far, most of the about 5,700 exoplanets have been discovered mainly with radial velocity and transit methods. These techniques are sensitive to planets in close orbits, not being able […]
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Exploration Gear & Tech, Gas Giants, Status Report, Stellar Cartography
The TESS-Keck Survey XXIV: Outer Giants May be More Prevalent in the Presence of Inner Small Planets
We present the results of the Distant Giants Survey, a three-year radial velocity (RV) campaign to search for wide-separation giant planets orbiting Sun-like stars known to host an inner transiting […]
Posted inAstrochemistry, Astronomy & Telescopes, Biosignatures & Paleobiology, Brown Dwarfs, Exoplanets, -moons, -comets, Gaia Mission, Icy Worlds, Interstellar, Status Report, Water/Hycean Worlds & Oceanography
Water-Bearing Objects in the Core of the Rho Ophiuchi Cloud Complex
We present a study of very low-mass stars and brown dwarfs in the rich star-forming core of the Rho Ophiuchi cloud complex. The selection of the sample relies on detecting […]
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
OGLE-2015-BLG-1609Lb: Sub-jovian Planet Orbiting A Low-mass Stellar Or Brown Dwarf Host
We present a comprehensive analysis of a planetary microlensing event OGLE-2015-BLG-1609. The planetary anomaly was detected by two survey telescopes, OGLE and MOA.