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Shadow Blaster

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Dusty Galaxy Emerges as Possible Source of Ghost Neutrinos
space-science2 months ago

Dusty Galaxy Emerges as Possible Source of Ghost Neutrinos

A high-energy neutrino detected by IceCube may have originated from Shadow Blaster, a dust-enshrouded, intensely star-forming galaxy 11 billion light-years away that is gravitationally lensed. This link, while tentative (about 1% chance of a random coincidence), suggests star-forming galaxies could contribute a significant fraction of the diffuse neutrino background, and motivates deeper multiwavelength follow-up with facilities like ALMA and JWST to pinpoint more such sources.

Dusty Galaxy Shadow Blaster Pinpoints Home of High-Energy Neutrino
science2 months ago

Dusty Galaxy Shadow Blaster Pinpoints Home of High-Energy Neutrino

Astronomers trace a high-energy neutrino detected by IceCube to Shadow Blaster, a dust-rich, strongly gravitationally lensed star-forming galaxy about 11 billion light-years away. This marks the first direct link between a single dusty galaxy and a high-energy neutrino, suggesting such galaxies can be significant sources of cosmic neutrinos and could contribute up to ~20% of the diffuse neutrino background; the finding, published in Nature Astronomy, relied on observations from JCMT, SMA, ALMA, and Gemini to map the galaxy’s dense, star-forming core and its lensing mass.