Overview
- A peer‑reviewed study published March 11, 2026 in The Astrophysical Journal reports a tenfold jump from about 3,000 to more than 33,000 Lyman‑alpha halos.
- The team, working with the Hobby‑Eberly Telescope Dark Energy Experiment, checked the 70,000 brightest of over 1.6 million early‑galaxy candidates and saw halo signs around nearly half.
- These halos are clouds of neutral hydrogen that glow in Lyman‑alpha light when ultraviolet radiation from nearby young stars excites the gas.
- The survey’s instrument captures roughly 100,000 spectra per observation and the analysis processed nearly half a petabyte of data with Texas Advanced Computing Center systems.
- The catalog reveals structures tens to hundreds of thousands of light‑years wide and points to more available raw fuel during Cosmic Noon, setting up targeted follow‑ups to refine galaxy‑formation models.