We present 1-5um spectroscopy of the coldest known brown dwarf, WISE J085510.83-071442.5 (WISE 0855), performed with the Near-Infrared Spectrograph (NIRSpec) on board the James Webb Space Telescope (JWST).
brown dwarf
Posted inAstronomy & Telescopes, Brown Dwarfs, Citizen Science / Open Science, Education and Outreach, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
An Investigation of New Brown Dwarf Spectral Binary Candidates From the Backyard Worlds: Planet 9 Citizen Science Initiative
We present three new brown dwarf spectral binary candidates: CWISE J072708.09−360729.2, CWISE J103604.84−514424.4, and CWISE J134446.62−732053.9, discovered by citizen scientists through the Backyard Worlds: Planet 9 project.
Posted inAstrochemistry, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Status Report
15NH3 In The Atmosphere Of A Cool Brown Dwarf
Brown dwarfs serve as ideal laboratories for studying the atmospheres of giant exoplanets on wide orbits as the governing physical and chemical processes in them are nearly identical. Understanding the […]
Posted inAstrochemistry, Brown Dwarfs, Exoplanets, -moons, -comets, Press Release
An Ammonia Trail To Exoplanets
They reveal the origin of wine, the age of bones and fossils, and they serve as diagnostic tools in medicine. Isotopes and isotopologues – molecules that differ only in the […]
Posted inAstrochemistry, Brown Dwarfs, Status Report
The First Y Dwarf Data From JWST Show That Dynamic and Diabatic Processes Regulate Cold Brown Dwarf Atmospheres
The James Webb Space Telescope (JWST) is now observing Y dwarfs, the coldest known brown dwarfs, with effective temperatures T_eff <= 475 K.
Posted inAstrochemistry, Astrogeology, Brown Dwarfs, Exoplanets, -moons, -comets, Status Report
FastChem Cond: Equilibrium Chemistry with Condensation and Rainout for Cool Planetary and Stellar Environments
Cool astrophysical objects, such as (exo)planets, brown dwarfs, or asymptotic giant branch stars, can be strongly affected by condensation. Condensation does not only directly affect the chemical composition of the […]
Posted inAstrochemistry, Biochemistry & Organic Chemistry, Brown Dwarfs, Press Release
First Observations Of Warm And Cold Methanol In Class 0/I Proto-brown Dwarfs
We present results from the first molecular line survey to search for the fundamental complex organic molecule, methanol (CH3OH), in 14 Class 0/I proto-brown dwarfs (proto-BDs). IRAM 30-m observations over […]
Posted inAtmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Self-consistent Models of Y Dwarf Atmospheres With Water Clouds And Disequilibrium Chemistry
Y dwarfs are the coolest spectral class of brown dwarf. They have effective temperatures less than 500 K, with the coolest detection as low as ~250 K. Their spectra are […]
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Detecting Exomoons From Radial Velocity Measurements Of Self-luminous Planets: Application To Observations Of HR 7672 B And Future Prospects
The detection of satellites around extrasolar planets, so called exomoons, remains a largely unexplored territory.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release
Search For Planets Around Stars With Wide Brown Dwarfs
Aims. The project aims to understand better the role of wide brown dwarf companions on planetary systems.