Milky Way’s First Microblazar Aims a Jet Toward Earth
Wednesday, September 30, 2026220 words3 minutes1977 reads
A newly identified Milky Way microblazar lets astronomers study blazars normally seen around supermassive black holes in distant galaxies. The object, IRAS 18293−0941, is a binary system: a black hole about ten times the Sun’s mass and a massive star orbiting one another roughly every 11 days. Gas pulled from the star forms a disk; some then escapes as narrow jets from the black hole’s poles.
One jet is aligned very close to our line of sight. Because its material moves at relativistic speeds, radiation directed toward Earth can appear unusually bright. This beaming effect is one reason blazars are so luminous. The alignment is an observing geometry, not evidence that Earth is threatened.
Radio observations trace the jet across roughly 100 light-years before it meets a dense molecular cloud. The impact region is bright, and researchers report that it coincides with a gamma-ray signature. They propose that the jet may accelerate particles there to energies near a petaelectronvolt, or PeV.
The evidence points to a promising accelerator, but the exact link between the jet, the gamma rays and the highest-energy cosmic particles remains a research question. The team plans more observations of the hot spot. Studying this microblazar in detail may help explain how energetic particles are produced elsewhere in the Milky Way and in far more distant galaxies.
