The James Webb Space Telescope has caught two galaxies colliding. In the midst of this cosmic clash, researchers have found something unexpected – there doesn’t seem to be an active supermassive black hole in either galaxy
, they rip huge streams of material off one another and create massive shock waves that pass through both galaxies. Both of these processes are highlighted in the red splotches in this image, which are star-forming regions shrouded in dust. They were most likely spurred into activity by the shock waves.at its centre, and researchers expect the black holes in merging galaxies to be relatively active, devouring gas from their surroundings and emitting huge amounts of radiation in the process.
“These mergers typically rile things up and cause these black holes to get a lot of gas and then they’re excited and things get interesting, but we don’t see that here,” says Armus. “It may be that we have to look a little harder – they don’t always stand up and wave.” A supermassive black hole or two may simply be unexpectedly inactive or hidden deep within the colliding galaxies.
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