Abstract Details
| Name: RUBINUR KHATUN Affiliation: Indian Institute of Astrophysics Conference ID: ASI2017_690 Title : Resolving the dual AGN and tracing the helical jets in 2MASXJ12032061+1319316 Authors and Co-Authors : Mousumi Das IIA Preeti Kharb NCRA Abstract Type : Poster Abstract Category : Extragalactic astronomy Abstract : We present the 6, 8.5, 11.5, 15, 22 and 33 GHz EVLA observations of a double-peaked emission line galaxy 2MASXJ12032061+1319316 (J1203). Double-peaked emission galaxies are candidates of dual/binary active galactic nuclei (AGN). Such supermassive black hole (SMBH) or AGN pairs are expected from galaxy mergers but their detection is still rare. High-frequency radio observations are the one way to resolve dual/binary AGN at sub-arcsecond resolution. Our 6,8.5, 11.5 and 15 GHz observations reveal a core-jet structure in J1203 and jet shows a symmetric S -shaped morphology that extends over a distance of ∼ 1.5 ′′ (or 1.74 kpc ) on either side of a core of size ∼ 0.1 ′′ (116 kpc). We have modeled the S-shaped structure as due to precessing jets that have an approximate time period of 10^5 years. This matches the source lifetime estimate via spectral aging. We thus conclude that the S-shaped radio morphology is due to precessing jet caused either by a binary/dual SMBH system, a single SMBH with a tilted accretion disk or a dual AGN system where a close pass of the secondary SMBH in the past has given rise to jet precession. We have calculated the separation of the expected binary. We also present 22 and 33 GHz EVLA observations which can confirm the dual/binary AGN picture. |