A Giant Black Hole's Wake in a Spiral Galaxy ⚡ экспресс
In the spiral galaxy NGC 3627, astronomers have discovered a narrow molecular trail of record-breaking length (8 kpc, about 26,000 light-years) and just 200 pc wide—a 40:1 ratio—far larger than any known trails in the Milky Way. Its supersonic turbulence (around 10 km/s) and shape suggest a recent (roughly 20 million years ago) flyby through the disk by an object weighing a million Suns—possibly a massive black hole or the core of a dwarf galaxy—moving at over 300 km/s. The finding turns such trails into a new tool for detecting massive dark bodies that interact with gas in galaxies.
In the galaxy NGC 3627, a trail of cosmic dust and gas has been found, resembling the wake of a speedboat. The role of the speedboat was played by a massive black hole or the core of a dwarf galaxy that tore through the disk at over 300 km/s. The wake stretches for 26,000 light-years but is just 650 light-years wide — like a pencil line drawn across a football field. The gas inside moves chaotically at tens of kilometers per second, hinting at a recent event: only about 20 million years ago.
The object that left this trail likely had a mass millions of times that of the Sun — an invisible giant that gave itself away by rippling the galactic disk. Such wakes can be spotted by telescopes like James Webb and ALMA, opening a new way to hunt for hidden massive bodies.
🎯 It takes light 26,000 years to travel from one end of the wake to the other — that's longer than the distance from Earth to the center of our Galaxy.