Kavli Affiliate: Luis C. Ho
| First 5 Authors: Santanu Mondal, Gourab Giri, Ravi Joshi, Paul J. Wiita, Gopal-Krishna
| Summary:
Our understanding of large-scale radio jets in merger systems has been
drastically improved in the era of VLA, VLBA/EVN, uGMRT, and MeerKAT. Twin
Radio Galaxies (TRGs) are the rare interacting galaxy pairs where both
supermassive black holes host kiloparsec-scale bipolar radio jets. Only
recently was a third TRG discovered and it shows significantly different jet
morphologies than the previous two. Due to both the extreme paucity and
complexity of such systems, the launching of their jets as well as their mutual
interaction during the propagation through the ambient medium are not well
understood. We have performed 3D hydrodynamic simulations to study the bipolar
jets in the third TRG, J104454+354055. Our study indicates that the precession
of mutually tilted bipolar jets originating from the two galactic nuclei
separated by tens of kiloparsecs and propagating at low velocities can explain
the observed morphologies. The simulated jet precession timescales are short
compared to the overall dynamical timescale of the jets and could originate
from Lense-Thirring effects in the accretion disks. This approach to
understanding the TRG jet dynamics could also be applied to other TRG systems
with similar helical morphologies that may be discovered in the upcoming era of
the SKA and its pathfinder surveys.
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