Abstract Details
| Name: Prajnadipt Ghosh Affiliation: Indian Institute of Astrophysics Conference ID: ASI2025_709 Title : On the origin of X-shaped radio galaxies: dual/binary AGN? Authors and Co-Authors : Prajnadipt Ghosh, Ravi Joshi Abstract Type : Poster Abstract Category : Galaxies and Cosmology Abstract : X-shaped radio galaxies (XRGs) are enigmatic radio galaxies showing two pairs of radio jets, unlike the normal radio galaxies with canonically one pair of radio jets. 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. Binary or dual AGNs have significant implications for merger dynamics, star formation, and AGN-driven outflows, underscoring the importance of studying these systems. We examine the hypothesis that galaxy mergers contribute to the X-shaped morphology and explore the potential of XRGs hosting dual or binary AGNs using the largest existing dataset of known X-shaped radio galaxies. Through emission-line fitting supported by our Very Long Baseline Interferometry (VLBI) observations, we have identified 39 AGNs with dual peaks and X-shaped morphology, positioning them as ideal candidates for binary black hole systems. The results warrant future multifrequency VLBI observations to ascertain whether these sources indeed contain binary AGNs. |