JWST Detects Hydrogen Cyanide and Acetylene in Brown Dwarf Atmosphere – A First
2025-02-28
The James Webb Space Telescope (JWST) has made a groundbreaking discovery! An international team of astronomers, using JWST, has for the first time detected hydrogen cyanide (HCN) and acetylene (C2H2) in the atmosphere of a nearby brown dwarf binary system designated WISE J045853.90+643451.9. Published on the arXiv preprint server, the finding reveals a cloud-free, molecule-rich atmosphere. The discovery showcases the power of JWST's Mid-Infrared Instrument (MIRI) Medium Resolution Spectrometer (MRS) in characterizing cool brown dwarfs. Future studies will investigate HCN and C2H2 in more detail and determine if these species are present in other similarly cool brown dwarfs.
(phys.org)