Astronomers Discover Black Hole Spin at Its Edge

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new Delhi: Astronomers make surprising discoveries from time to time. Black holes are undoubtedly one of the most fascinating subjects for any astronomer. A recent discovery by a team of astronomers found that a black hole spins on its own side.


The team published their findings in the journal Science. Scientist Prof. Dr. Svetlana Berdugina, Professor of Astrophysics at the University of Freiburg and Director of the Leibniz Institute for Solar Physics (KIS), together with an international team of astronomers has for the first time reliably measured a large difference between the rotation axes. The black hole and the axis of the orbit of the binary star system MAXI J1820+070.


The axis of rotation of the black hole is tilted by more than 40 degrees with respect to the axis of the star’s orbit. “This discovery challenges current theoretical models of black hole formation,” Berdugina said.


“The difference of more than 40 degrees between the orbital axis and the spin of a black hole was completely unexpected. Scientists have often assumed that this difference is too small when modeling the behavior of matter in the period of rotation around a black hole. ”, explained Berdugina.


The new discovery forced astronomers to add a new dimension to their models.


The research team made their discovery with the astronomical polarimeter DIPOL-UF, an instrument for measuring the angle of optical rotation of light. It was built by the Leibniz Institute for Solar Physics (KIS) and the University of Turku/Finland. It was eventually put to use at the Nordic Optical Telescope on La Palma, Spain.


“Our used DIPol-UF is unique in its ability to measure optical polarization with precision and accuracy of a few parts per million. Determining the orbital orientation of black holes based on polarization is a key to understanding their formation and physics. Opens new avenues. , ”explained Berdyugina.


Black holes in binary star systems were formed by a cosmic cataclysm – the collapse of a massive star. Now, researchers note how a black hole pulls matter away from theNear e, the lighter companion star is orbiting the system’s center of gravity.


Bright optical radiation and X-rays were observed as the last sign of falling material, as well as radio emissions from jets ejected from the system. By tracking jets, luminous gas streams in the radio and X-ray range, the scientists were able to pinpoint the direction of the black hole’s rotation axis. (ANI)

First published:March 2, 2022, 3:35 pm

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