The Brown Dwarf Gliese 229 B Is Resolved into a Binary System
The brown dwarf Gliese 229 B, previously considered unusually massive and under-luminous, has been resolved into a binary system, Gliese 229 BaBb, using GRAVITY interferometry and CRIRES+ spectroscopy, reconciling its properties with theoretical models and providing insights into the formation of tight brown dwarf binaries.
