Star-Forming Region, Not Black Hole, Powers High-Energy Neutrino Factory
AryHHAry · x · 2026-08-09
Scientists previously believed that high-energy neutrinos primarily originated from supermassive black holes (such as blazars or tidal disruption events), but new observations challenge this.
Using ALMA observations and gravitational lensing analysis, researchers pinpointed the galaxy JCMT0402−0424 (nicknamed Shadow Blaster), located about 11 billion light-years away. It aligns with a 750 TeV high-energy neutrino event detected by IceCube.
Data shows the galaxy's core is extremely compact with a star formation rate of 270-470 solar masses per year, lacking the bright X-ray or γ-ray emissions typical of an active galactic nucleus (AGN). This suggests the neutrino originated from a pure starburst process. Population models estimate such compact starburst galaxies could contribute up to 20% of the universe's high-energy neutrino background.
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