We present the a near complete spectral energy distribution (SED) for an extrasolar world: the T8 brown dwarf 2MASS~J04151954−0935066. Spanning from optical to mid-infrared (0.7–20.4 micron) wavelengths, the SED for […]
brown dwarf
Posted inAriel Mission, Astronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Ten Aligned Orbits: Planet Migration in the Era of JWST and Ariel
Understanding the diverse formation and migration pathways that shape exoplanetary systems requires characterizing both their atmospheric properties and their orbital dynamics.
Posted inAstropharmacy / Biotechnology, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
Evidence For A Polar Circumbinary Exoplanet Orbiting A Pair Of Eclipsing Brown Dwarfs
One notable example of exoplanet diversity is the population of circumbinary planets, which orbit around both stars of a binary star system.
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Brown Dwarfs, Imaging & Spectroscopy, Status Report
MINDS: The Very Low-mass Star And Brown Dwarf Sample — Hidden Water In Carbon-dominated Protoplanetary Disks
Infrared observations of the inner disks around very low-mass stars (VLMS, <0.3M⊙) have revealed a carbon-rich gas composition in the terrestrial planet-forming regions. Contrary to the typically water-rich T Tauri […]
![JWST-MIRI MRS spectrum of the young J0438 disk (black). The spectrum is dominated by amorphous silicate absorption and emission bands typical of a highly inclined disk configuration. A very weak CO2 ice absorption feature is tentatively detected (see Appendix A, Fig. 8) along with inner disk gas reservoir (Table 3) composed by molecular hydrogen (H2), water (H2O), carbon dioxide (CO2), hydrogen cyanide (HCN), acetylene (C2H2) and the singly ionized cations of argon and neon ([Ar+], [Ne+]; for zoom-ins see Appendices B and C). The comparison between the JWST-MIRI and the Spitzer -IRS low- (SL, LL) and high- (SH) resolution spectra reveal continuum and line variability (grey and teal). The Spitzer -IRS spectra were taken from CASSIS (Lebouteiller et al. 2011, 2015) and Pascucci et al. (2013). -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/04/MINDS-Anatomy-of-a-water-rich.png?resize=1200%2C717&ssl=1)
Posted inAstrochemistry, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Brown Dwarfs, Imaging & Spectroscopy, Interstellar, Status Report
MINDS. Anatomy Of A Water-rich, Inclined, Brown Dwarf Disk: Lack Of Abundant Hydrocarbons
2MASS J04381486+2611399 (or J0438) is one of the few young brown dwarfs (BD) with a highly inclined (i∼70∘) disk.
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Interstellar, Status Report
Free-floating Planetary Mass Objects In LDN 1495 From Euclid Early Release Observations
Context. Substellar objects, including brown dwarfs and free-floating planetary-mass objects, are a significant product of star formation.
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Interstellar, Press Release
New Study Reveals How Rogue Planetary-mass Objects Form In Young Star Clusters
A groundbreaking study published in Science Advances sheds new light on the mysterious origins of free-floating planetary-mass objects (PMOs)—celestial bodies with masses between stars and planets.
Posted inBrown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Interstellar, Status Report
Free-floating Planetary Mass Objects In LDN 1495 From Euclid Early Release Observations
Context. Substellar objects, including brown dwarfs and free-floating planetary-mass objects, are a significant product of star formation. Their sensitivity to initial conditions and early dynamical evolution makes them especially valuable […]
Posted inAstronomy & Telescopes, Biochemistry & Organic Chemistry, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report
The Diversity of Cold Worlds: A Blended-light Binary Straddling The T/Y Transition In Brown Dwarfs
We present the first brown dwarf spectral binary characterized with JWST: WISE J014656.66+423410.0, the coldest blended-light brown dwarf binary straddling the T/Y transition.
Posted inAstrochemistry, Astrogeology, Brown Dwarfs, Exoplanets, -moons, -comets, Interstellar, Status Report
Early Accretion of Large Amounts of Solids for Directly-Imaged Exoplanets
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.