To find the black hole, the team dug deep into data comprising nearly 200,000 binary stars.
"It is closer to the sun than any other known black hole, at a distance of 1,550 light years," Dr.
The Automated Planet Finder in California, Chile's Giant Magellan Telescope, and the W.M. Keck Observatory in Hawaii provided the measurements of the sources that were final contenders."The pull of the black hole on the visible sun-like star can be determined from these spectroscopic measurements, which give us a line-of-sight velocity due to a Doppler shift," said Chakrabarti.
The professor explained that analyzing the line-of-sight velocities of the visible star, which is similar to our sun, can help explain how enormous the black hole companion is, along with the period of rotation and the orbit.Sloan Digital Sky Survey / S. Chakrabart et al."These spectroscopic measurements independently confirmed the Gaia solution that also indicated that this binary system is composed of a visible star that is orbiting a very massive object," she said.
A million visible stars have gigantic black hole companions in our galaxy. But, Chakrabarti stressed that the Gaia mission largely helped in narrowing down their search. "There are currently several different routes that have been proposed by theorists, but noninteracting black holes around luminous stars are a very new type of population," Chakrabarti said. "So, it will likely take us some time to understand their demographics, and how they form, and how these channels are different – or if they're similar – to the more well-known population of interacting, merging black holes.
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