Milky Way neutrino map shows where ghost particles originate

Researchers at the University of Copenhagen combined advanced stellar models with ESA Gaia data to produce the first complete map of neutrino production across the Milky Way, finding the strongest signals near the galactic centre and from younger, massive stars.

Researchers at the University of Copenhagen have produced the first complete map of neutrino production across the Milky Way, and the results were published in Physical Review D. The map was created by combining advanced stellar models with positional and population data from ESA's Gaia telescope. It identifies which regions of the Galaxy generate the strongest neutrino signals and how production varies with stellar age and mass. The study reports that denser star regions near the galactic centre and younger, heavier stars contribute most of the predicted neutrino flux. Key findings: - The work is described as the first full map of neutrino production across the Milky Way. - The map combines theoretical stellar models with observational data from ESA's Gaia mission. - The strongest predicted neutrino signals come from regions near the galactic centre where stars are more densely clustered. - Younger stars heavier than the Sun are reported to produce the majority of stellar neutrinos. - The authors note the map gives neutrino observatories more precise guidance on where galactic neutrino signals should be strongest. Summary: The map provides a baseline picture of where stellar neutrinos originate in our Galaxy and which stellar populations contribute most. Reported next steps include using the map as a reference for observational searches and for studies that might probe subtle deviations in neutrino behaviour, while detailed observational plans are undetermined at this time.