A study led by astronomers at the Indian Institute of Astrophysics has detected the Fe K spectral lines of ionized Iron atoms from the well-known binary Active Galactic Nucleus system 4C+37.11 using data from the Chandra Space Telescope. This is the first such detection from a binary black hole system, and they were able to conclude that this emission arises from both the accretion disk and the collisionally ionized plasma surrounding the pair of supermassive black holes in this object.

This is based on the recently published paper titled "Detection of the Fe K lines from the binary AGN in 4C+37.11", by Mondal et al, 2024, Astronomy & Astrophysics, 279, 7.

Press release by PIB published here.

Press release issued by DST here.

Download the paper from here.