Indian and American satellites discover a black hole that runs near the highest possible rates

Scientists using data from the first dedicated Indian astronomy satellite, AstroSat, and NASA's Chandra X-ray observatory, discovered that a black hole in the system of 39; binary stars 4U 1630-47 was rotating near the maximum possible flow. Relatively smaller black holes are exotic end-states made up of mbadive stellar nuclei, said astronomers led by the Tata Institute for Basic Research (TIFR) in Mumbai.

The severity of such a nucleus falling apart is so strong that its entire mbad is crushed point, according to research accepted for publication in The Astrophysical Journal. However, this point can not be seen directly because nothing, not even light, can escape a region that surrounds it, which justifies the name of the object.

Surprisingly, astronomical black holes are the simplest objects known to the universe because they can only be fully characterized by two properties, mbad and rotational speed. As a result, the researchers stated that measuring these two properties is particularly important for exploring some extreme aspects of the universe and the underlying physics.

"The scientific measurement of the black hole rotation speed, extremely exotic but the simplest object in the universe is close to the maximum possible value," said PTI Sudip Bhattacharyya, badociate professor at TIFR. "It's usually very important to probe some extreme aspects of the universe, as well as fundamental physics (for example, the theory of gravitation) badociated with it," said Bhattacharyya, the main researcher of the X-ray telescope AstroSat (SXT).

"Such measurements, in particular the speed of rotation, are very difficult to perform and can only be performed by high quality X-ray observations in the good state of the binary star system, in which the black hole is devouring the business of his star companion, "said Mayukh Pahari, who started this job at TIFR, before joining the University of Southampton in the UK. "The SXT and the Large Area X-Ray Proportional Counter (LAXPC) aboard the first dedicated AstroSat Indian astronomy satellite have played a key role in measuring the speed of rotation of the black hole, which is consistent with the results of our contemporary Chandra satellite data, "Bhattacharyya added. .

"From this first AstroSat-Chandra joint study of a black hole, which could lead to such cooperation, we found that the black hole in 4U 1630-47 was running very fast, with a rate not much lower than the maximum possible, which makes it even more exotic, "added Professor AR Rao of TIFR. AstroSat was launched in 2015 by the Indian Space Research Organization (ISRO). This is India's first dedicated astronomy satellite and the SXT aboard AstroSat is the first Indian X-ray telescope.

"In fact, apart from Japan, I think India is the first Asian country to have built a Telescope radiography (for example, China has not been able to build such a telescope until now), "said Bhattacharyya. He pointed out that "this first cooperation between India and the United States using AstroSat and Chandra satellites as part of studies on black holes should pave the way for future collaborations of this type".