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Evidence for a TDE origin of the radio transient Cygnus A-2

Reynolds, C. S.; Rowlinson, A.; Siemiginowska, A. +3 more

In 2015, a radio transient named Cygnus A-2 was discovered in Cygnus A with the Very Large Array. Because of its radio brightness (νF_ν ≈ 6 × 10³⁹ erg s^-1), this transient likely represents a secondary black hole in orbit around the active galactic nucleus. Using Chandra ACIS observations from 2015 to 2017, we have …