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Adam J. Burgasser

2 articles · 30 co-authors · latest: 2026-02-05

Failed Star Shakes Up a Phosphine Cocktail

Using Webb, astronomers peered into the atmosphere of the brown dwarf Wolf 1130C and found phosphine — a gas familiar from Jupiter. Its abundance is ten times higher than expected, pointing to vigorous mixing of layers, like in a planetary mixer. Now the boundary between giant planets and brown dwar
arXiv:2510.03916 · 2025-10-04

Cold Water Trail in the Red Dots of Space

The James Webb Telescope discovered that the mysterious red dots are not hot disks around black holes, but dense clouds of water vapor with temperatures around 2000–4000 °C. This reduced the mass estimates of black holes by an order of magnitude.
arXiv:2602.06024 · 2026-02-05