Astronomers Capture Historic Image Of Two Black Holes Orbiting Each Other In Quasar OJ 287

Scientists have achieved a significant milestone by capturing the first radio image showing two supermassive black holes orbiting each other. This discovery was made within a quasar named OJ 287, located approximately 5 billion light-years away in the Cancer constellation. Quasars are incredibly bright regions at galaxy centres, where intense conditions around supermassive black holes cause gas and dust to heat up and emit light.

The international research team released this image, providing the clearest evidence yet of binary black holes—two gravitational giants bound together. "Quasar OJ287 is so bright that it can be detected even by amateur astronomers with private telescopes," stated Mauri Valtonen, an astronomer from the University of Turku, Finland. This marks the first visual confirmation of two black holes orbiting together, a feat not achieved before due to limitations in telescope resolution.

Previously, astronomers had only imaged individual black holes like those in the Milky Way and Messier 87. Although gravitational-wave detections suggested such pairs existed, OJ 287's black holes had never been visually resolved until now. The breakthrough was possible through radio observations combining Earth-based telescopes with the RadioAstron (Spektr-R) satellite. This satellite's orbit extended halfway to the moon, offering a view about 100,000 times sharper than typical optical images.

The new radio image matched past theoretical calculations perfectly. "The two black holes were there in the image, just where they were expected to be," Valtonen confirmed. Although black holes themselves are invisible, they can be detected through particle jets or glowing gas surrounding them. The smaller black hole's jet appeared twisted like a rotating garden hose due to its rapid motion around the larger one.

This twisting motion causes the jet to wag back and forth like a cosmic tail as the smaller black hole completes its 12-year orbit. Researchers noted this offers a unique chance to observe its motion evolving over time. The study detailing these findings was published in the Astrophysical Journal.

The discovery of these orbiting supermassive black holes within quasar OJ 287 provides crucial insights into cosmic phenomena. It highlights how advanced technology can enhance our understanding of complex astronomical events and structures.

With inputs from WAM