Published 18:13 IST, July 1st 2020
Researchers find 'hungry' black hole that gobbles up one Sun every day
A new research led by the Australian National University (ANU) now tells us just how massive the fastest-growing black hole, J2157, in the universe actually is
Shedding some more light on the titanic mystery surrounding one of the most interesting celestial objects, a new research led by the Australian National University (ANU) now tells us just how massive the fastest-growing black hole in the universe actually is.
This giant black hole — known as J2157 — was discovered by the same research team in 2018. It is 34 billion times the mass of our Sun and gobbles on nearly the equivalent of one Sun every day, according to Dr. Christopher Onken and his colleagues.
"The black hole's mass is also about 8,000 times bigger than the black hole in the centre of the Milky Way. If the Milky Way's black hole wanted to grow that fat, it would have to swallow two-thirds of all the stars in our galaxy... We're seeing it at a time when the universe was only 1.2 billion years old, less than 10 percent of its current age. It's the biggest black hole that's been weighed in this early period of the universe," Dr. Onken said.
A new record holder
Exactly how black holes grew so big so early in the life-span of the universe is still a mystery, but the team is now searching for more black holes in the hope they might provide some clues.
"We knew we were onto a very massive black hole when we realised its fast growth rate," said team member Dr. Fuyan Bian, a staff astronomer at the European Southern Observatory (ESO). "How much black holes can swallow depends on how much mass they already have. So, for this one to be devouring matter at such a high rate, we thought it could become a new record holder. And now we know," Dr. Fuyan Bian added.
The team, including researchers from the University of Arizona, used ESO's Very Large Telescope in Chile to accurately measure the black hole's mass. "With such an enormous black hole, we're also excited to see what we can learn about the galaxy in which it's growing," Dr. Onken said.
Dr. Onken said added, "is this galaxy one of the behemoths of the early universe, or did the black hole just swallow up an extraordinary amount of its surroundings? We'll have to keep digging to figure that out."
(With ANI inputs) (Image Source: NASA/CXC/M.Weiss)
Updated 18:13 IST, July 1st 2020