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X-shaped radio galaxies (XRGs) are enigmatic radio galaxies
showing two pairs of radio jects, unlike the normal radio galaxies with
canonically one pair of radio jet. One hypothesis for this unusual
structure is that the jets are launched by a pair of active supermassive
black holes (SMBHs) or the secondary lobes are simply relics of a
previous jet actively, possibly resulting from a galaxy merger. Such
mergers can fuel gas accretion into SMBHs, potentially leading to the
formation of dual or binary AGNs, depending on the separation of the
nuclei. This makes such sources primary candidates for detecting
gravitational waves. The presence of binary or dual AGNs has significant
implications for merger dynamics, star formation, and AGN-driven
outflows, underscoring the importance of studying these systems. In this
talk, I will explore the potential role of XRGs as hosts of binary or
dual AGNs; only two binary SMBHs have been found hitherto.
BGS Office