An international team of astronomers led by Dr. Benetge Perera have found evidences of a black ole in the Milky Way Galaxy in the Sagittarius constellation.
The group found evidences that a millisecond pulsar (PSR B1820-30A) in NGC 6624, is most likely orbiting around an intermediate-mass black hole (IMBH) located at the cluster’s center.
Talking about the finding, Dr. Perera said, “High stellar densities towards the centre of globular clusters provide a likely environment for the formation of massive black holes. The detection of IMBHs is important for understanding the missing link between the different kinds of black holes.
“It is generally thought that they could be formed by the direct collapse of very massive primordial stars or successive mergers of stellar-mass black holes and runaway collisions in dense young star clusters.”
Profesor Andrew Lyne from the School of Physics and Astronomy at the University of Manchester explained, “Pulsars like PSR B1820 30A act as fantastically accurate clocks and allow us to determine precisely their distance from the Earth in the same way that global positioning satellites work. The pulsar is therefore very sensitive to any motion arising from the gravity of other nearby massive objects, such as black holes, making it easier for us to detect them.”
Dr. Perera added, “We have determined the orbital parameters and the companion mass of PSR B1820-30A from the motion measured through pulsar timing. Simply put, this means our results are consistent with the pulsar being in orbit around a central intermediate-mass black hole.
“This discovery provides important input to our understanding of how intermediate-mass black holes and the clusters themselves form and evolve.”
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