In a recent discovery, Scientists have been able to successfully detect the most compact double supermassive black hole. And the important thing is that two Indian scientists are involved in this discovery of two-closest-ever black holes ever as far as super-massive binary black hole system is concerned. These are situated around 400 million light years away from the Earth. Those dual supermassive black holes are believed to be physically separated by a distance of just one light year, and these are also part of an active galaxy.
Actually, active galaxies are those rare galaxies that glow more intensely at their centers as compared to normal galaxies and usually contain one supermassive black hole. But a recent discovery made by Preeti Kharb and Dharam Veer Lal of TIFR-National Centre for Radio Astrophysics, Pune, and David Merritt from Rochester Institute of Technology, USA, revealed that a binary black hole system was astonishingly found inside a spiral galaxy, named as NGC 7674 (Mrk 533). Because, usually, such type of binary systems were found to be present inside elliptical galaxies.
Dharam Veer Lal said that Elliptical galaxies are generally formed after the collision and merging of two spiral galaxies, and hence they possess one supermassive black hole at their center. But it’s the first time that a binary supermassive black hole has been discovered inside a spiral galaxy. And the strong radio signals emitting out of the newly discovered object also strengthens the fact that binary supermassive black hole is present inside the faraway galaxy.
Another Indian scientist Preeti Kharb who was working on examining the images got some great high-resolution pictures with the help of a technique called very long baseline interferometry. The images of the center part of NGC 7674 were carefully captured at different frequencies of 2GHz, 5GHz, 8GHz and 15 GHz. It would have been very difficult to measure the closeness of the two black holes without the use of the higher resolution techniques through 10 dish antennas.
Lal informed that the powerful antennas, kept across a distance of 8,900 kms in the US, were used to capture images of the massive object and it successfully confirmed that the two massive black holes are separated by a distance of about one light year.
Now the astronomers will use this latest discovery and compare it with the existing theoretical models so as to get a perfect explanation for the presence of such compact binary supermassive black holes inside a spiral galaxy. The research study was published online in Nature Astronomy.