Supermassive black hole growth spurts might be rarer than suspected.
it studied.
“We are actually probing a new population” of galaxies, says Tonima Tasnim Ananna, an astronomer at Wayne State University in Detroit, who was not involved with the study. The new data come from the far reaches of the universe, a region now more accessible than ever before thanks to JWST. If there really aren’t as many of these fast-growing black holes as once thought, it would throw astronomers’ understanding of black hole and galaxy formation for a loop. Supermassive black holes can weigh as much as several million — or even several billion — suns. The AGN phase is thought to be an important step for gathering so much mass.
And an active black hole doesn’t just grow quickly in isolation. It also affects its host galaxy. “It gets really, really hot” in an AGN, Kirkpatrick says. That can make it harder for the host galaxy to form stars, which need relatively cool gas to get started.
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