PHOTO OF THE DAY: Black Hole Bounty Captured in the Center of the Milky Way
By Space Coast Daily // June 21, 2020
This black hole bounty consists of stellar-mass black holes
(NASA) – Astronomers have discovered evidence for thousands of black holes located near the center of our Milky Way galaxy using data from NASA’s Chandra X-ray Observatory.
This black hole bounty consists of stellar-mass black holes, which typically weigh between five to 30 times the mass of our Sun.
These newly identified black holes were found within three light-years — a relatively short distance on cosmic scales — of the supermassive black hole at our Galaxy’s center known as Sagittarius A* (Sgr A*).
Theoretical studies of the dynamics of stars in galaxies have indicated that a large population of stellar mass black holes — as many as 20,000 — could drift inward over the eons and collect around Sgr A*.
This recent analysis using Chandra data is the first observational evidence for such a black hole bounty.
A black hole by itself is invisible. However, a black hole — or neutron star — locked in close orbit with a star will pull gas from its companion (astronomers call these systems “X-ray binaries”).
This material falls into a disk and heats up to millions of degrees and produces X-rays before disappearing into the black hole. Some of these X-ray binaries appear as point-like sources in the Chandra image.
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