December 14, 2023

central area of the star-forming area IC 348 seen by the James Webb Space Telescope's NIRCam instrument. Zooms in the insets show the three brown dwarfs discovered in this study.

An article published in “The Astronomical Journal” reports the discovery of three brown dwarfs in the star formation area cataloged as IC 348, part of the large Perseus Cloud. A team of researchers used the James Webb Space Telescope to study that area searching for brown dwarf candidates and identifying three with masses less than eight times Jupiter’s. The smallest of them has a mass estimated between three and four times Jupiter’s, making it the smallest known brown dwarf. Two of them show the chemical signatures of an unidentified aliphatic hydrocarbon whose presence is not predicted by any atmospheric model.