Using the Hubble Space Telescope, scientists not only discovered the rogue object, but also directly
What is known about her?
A stellar mass black hole is located approximately5,000 light years from Earth in the Sagittarius Carina spiral arm of the Milky Way. Usually such objects have companion stars, but this one is one. Two teams used Hubble data to make the discovery: one team was led by Kailash S. Sahu, an astronomer at the Space Telescope Science Institute in Baltimore, Maryland; and the other is Casey Lam from the University of California at Berkeley.
Sahu's team determined that the mass of the celestialthe nomad is seven times faster than the sun. Also, the black hole moves at a speed of about 162,200 km/h. This suggests that it was launched at great speed by the process that gave birth to it.
When near a huge star, about 20 timesmore massive than the Sun, it runs out of nuclear fuel, it collapses. The result is either a neutron star or a black hole, as well as a supernova explosion. If it is not perfectly symmetrical, it can give the stellar remnant a “push” that will throw it across spirals from surrounding stars.
How was a black hole found?
Since stellar black holes do not emit light, astronomers use astrometric or gravitational microlensing to detect them.
In this case, the microlensing eventMOA-11-191/OGLE-11-462, which was used to detect this black hole, can be distinguished from the usual lensing effects of an intervening star. It would cause a change in the color of the light from the background source. However, scientists did not detect them, suggesting that the source was a single black hole.
How was its mass measured?
General relativity suggests thatThe degree to which light is deflected depends on how much the source bends space-time. And this curvature is determined by the mass of the object. To understand this concept, you can imagine balls of varying masses on a stretched rubber sheet. The greater the mass of each, the stronger the dent. Thus, by measuring the amount of deflection caused by the black hole, the team obtained an extremely accurate measurement of mass.
In the course of the study, one group of scientists found thatthat the black hole is single and does not have a companion within a radius of about 200 astronomical units. “There is no place for a neutron star in our analysis,” the astronomers noted.
Einstein's Proof
According to Kailash Sahu, the new discoveryproves Albert Einstein right twice. First, the general theory of relativity is confirmed. It is necessary to explain the existence of a single black hole. Secondly, the scientists' work proves Einstein's 1915 theory of geometric gravity and the concept of mass formation and space-time curvature.
“I was surprised and at the same time impressed by how beautifully the dimensions fit the model,” concludes the scientist. “The measured deviations match exactly, so Einstein was absolutely right.”
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