WISE J1828 Archives

Comparison of the 14N/15N ratio in the solar neighbourhood. The values are based on either ammonia isotopologues (orange circles) or other molecules (black symbols), in different environments, subdivided by classes7 . Our estimate for WISE J1828 appears as the brown dwarf class and is consistent with solar values (dashed horizontal yellow line) at the 1-2 σ level. Lower values indicate enrichment in 15N, while the dashed blue line represents the current value of the interstellar medium (ISM). -- astro-ph.SR

Astrochemistry, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Status Report

15NH3 In The Atmosphere Of A Cool Brown Dwarf

by Keith CowingNovember 16, 2023November 16, 2023

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 […]

Artistic impression of brown dwarf WISE J1828, one of the coldest gas giants know outside of our Solar System. Its atmosphere is dominated by the absorption from water, methane and ammonia vapour. -- ETH Zurich

Astrochemistry, Brown Dwarfs, Exoplanets, -moons, -comets, Press Release

An Ammonia Trail To Exoplanets

by Keith CowingNovember 7, 2023April 14, 2026

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 […]