JWST has detected hydrogen cyanide and acetylene in the brown dwarf binary WISE J0458+6434

20. 2. 2025

JWST has detected hydrogen cyanide and acetylene in the brown dwarf binary WISE J0458+6434

Star system: WISE 0458+6434 A | Distance from the Sun: 30.1 light years

These molecules suggest intense vertical mixing in the atmosphere, challenging previous models of carbon chemistry in cold brown dwarfs. WISE J0458+6434 is a binary system with two T-type brown dwarfs separated by several AU. The pair lies 30 light years away.

Generated by LLM, corrected by human

Share this discovery

Related themes

Stars Brown dwarfs

Scientific study

HCN and C2H2 in the atmosphere of a T8.5+T9 brown dwarf binary external link

Stars mentioned

WISE 0458+6434 A

T8.5, Brown dwarf

mass: 0.01 M☉

radius: 0.06 R☉

distance: 30.1 ly

stars in the system: 2

exoplanets: 0

Research with similar tags

Browse the latest scientific studies on stars and exoplanets in our galaxy. Stellar Catalog provides access to scientific data from astrophysics and stellar or planetary astronomy. It's a resource for anyone interested in the newest discoveries about what lies beyond our solar system.

Latest discoveries

HD 203771 184 ly		An Intermediate-orbit Brown Dwarf Confirmed with Astrometry+Radial Velocity Joint Analysis, and the Eccentricity Distribution of Brown Dwarfs Across Different Locations 14. 10. 2026
HD 89744 126 ly	+2	Gaseous SiO and Silicate Clouds in Three Benchmark Early-L Dwarfs 9. 10. 2026
DENIS J1253-5709 54.4 ly		Astrometric planet search around southern ultracool dwarfs: V. Discovery of the exoplanet candidate PALTA-1 b 9. 10. 2026
2MASS 0036+1821 28.5 ly		A Jupiter-like radio aurora in the L3.5 dwarf LSPM J0036+1821 9. 10. 2026
WISEA J1553+6933 6608 ly		JWST Observations of the Metal-poor T Dwarf WISEA J155349.96+693355.2: The First Brown Dwarf Associated with the Gaia-Enceladus Milky Way Substructure 25. 9. 2026

More research

Get your next news from nearby stars

Stellar Catalog brings the stars from our galaxy to you. Discover their position, physical properties and whether there are any exoplanets or disks orbiting them. The data in Stellar Catalog come from respectable sources like Gaia space telescope, or SIMBAD database.

Stellar catalog: Discover the nearby universe

Visit profile on X Follow Stellar catalog