Supermassive black holes eventually stop star formation
Researchers analyzed the correlation between the mass of supermassive black hole and the history of star formation in its galaxy. They found that the bigger the black hole is, the harder it is for the galaxy to generate new stars.
Scientists have been debating this theory for a while, but until now, they lacked enough observational data to prove or disprove it.
Researchers from the University of Santa Cruz, California used data from previous studies measuring super massive black hole mass. They then used spectroscopy to determine how stars formed in galaxies featuring such gargantuan black holes and correlate the two.
Spectroscopy is a technique that relies on measuring the wavelength of light emerging from objects stars, in this case. The paper’s lead author Ignacio MartÃn-Navarro used computational analysis to determine how the black holes affected star formation in a way, he tried to solve a light puzzle.
“It tells you how much light is coming from stellar populations of different ages,” he said in a press release.
Next, the research team plotted the size of supermassive black holes and compared them to a history of star formation in that galaxy. They found that as the black holes grew more and more, star formation was significantly slowed down. Other characteristics of the galaxies, such as shape or size, were found irrelevant to the study.
“For galaxies with the same mass of stars but different black hole mass in the center, those galaxies with bigger black holes were quenched earlier and faster than those with smaller black holes. So star formation lasted longer in those galaxies with smaller central black holes,” MartÃn-Navarro said.
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