24 citations · 57 across the 13 of their papers we have counts for
14 papers
Simulating megaparsec-scale jets of radio galaxies: Magneto-hydrodynamics of jets reaching 5 Mpc
Gourab Giri, Dario Borgogno, Marco Tavani +9
Extragalactic jets have long prompted the question of how far relativistic outflows can extend, with some radio sources reaching 5 - 7 Mpc in length. These great extents motivate i…
Galactic-scale evolution of classical and complex radio galaxies. Impact of ambient morphology and jet geometry
Gourab Giri, Prajnadipt Ghosh, Ravi Joshi +9
Extragalactic jets exhibit a wide range of propagation orientations relative to the host galaxy's principal axis. This study investigate the spatiotemporal evolution of jets as a f…
Performance assessment of the gPLUTO code for the numerical modeling of radio galaxy evolution
Gourab Giri, Andrea Mignone, Alessio Suriano +2
High-resolution tri-axial simulations are indispensable for realistically co-modeling the dynamical signatures and the radiative fingerprints of astrophysical jets, which are becom…
Probing the formation of megaparsec-scale giant radio galaxies II. Continuum & polarization behavior from MHD simulations
Gourab Giri, Christian Fendt, Joydeep Bagchi +4
The persistence of radiative signatures in giant radio galaxies remains a frontier topic of research, with contemporary telescopes revealing intricate features that require investi…
Origin of the double-peaked narrow emission-lines in the optical spectra of X-shaped Radio Galaxies
Ghosh Prajnadipt, Ravi Joshi, Xiaolong Yang +13
We investigate X-shaped radio galaxies (XRGs) with optical double-peaked narrow emission lines (DPNELs) as potential hosts of dual or binary supermassive black holes (SMBHs). Using…
HI gas in the rejuvenated radio galaxy PKS 2014-55
Leon Mtshweni, Kshitij Thorat, Roger P. Deane +17
We present new high-spectral-resolution MeerKAT observations of absorption against the central region of the restarted, giant, X-shaped radio galaxy PKS2014-55, which…
MeerKAT 1.3 GHz Observations of the Wide Angle Tail Radio Galaxy J17122435
William Cotton, Gourab Giri, P. J. Agnihotri +3
We present full polarization MeerKAT images of the wide-angle tail, giant radio galaxy J17122435 at 1.3 GHz with 7.\asec5 resolution and an RMS sensitivity of 8 Jy beam$^{-1}…
Low-velocity precessing jets can explain observed morphologies in the Twin Radio Galaxy TRG J104454+354055
Santanu Mondal, Gourab Giri, Ravi Joshi +3
Our understanding of large-scale radio jets in merger systems has been drastically improved in the era of VLA, VLBA/EVN, uGMRT, and MeerKAT. Twin Radio Galaxies (TRGs) are the rare…
Probing the Formation of Megaparsec-scale Giant Radio Galaxies (I): Dynamical Insights from MHD Simulations
Gourab Giri, Joydeep Bagchi, Kshitij Thorat +3
Giant radio galaxies (GRGs), a minority among the extended-jetted population, form in a wide range of jet and environmental configurations, complicating the identification of the g…
X-Shaped Radio Galaxies: Probing Jet Evolution, Ambient Medium Dynamics, and Their Intricate Interconnection
Gourab Giri, Christian Fendt, Kshitij Thorat +2
This review explores the field of X-shaped radio galaxies (XRGs), a distinctive subset of winged radio sources that are identified by two pairs of jetted lobes which aligned by a s…
Deciphering the morphological origins of X-shaped radio galaxies: Numerical modeling of Back-flow vs. Jet-reorientation
Gourab Giri, Bhargav Vaidya, Christian Fendt
X-shaped Radio Galaxies (XRGs) develop when certain extra-galactic jets deviate from their propagation path. An asymmetric ambient medium (Back-flow model) or complex Active Galact…
Remnants of recent mergers in nearby early-type galaxies and their classification
Gourab Giri, Sudhanshu Barway, Somak Raychaudhury
We search for signatures of recent galaxy close interactions and mergers in a sample of 202 early-type galaxies in the local universe from the public SDSS Stripe82 deep images ($μ_…
Dynamical Modelling and Emission Signatures of a Candidate Dual AGN with Precessing Radio Jets
Gourab Giri, Ravi Pratap Dubey, K. Rubinur +2
In this paper, we have modelled the dynamical and emission properties (in the presence of radiative losses and diffusive shock acceleration) of an observed S-shaped radio source (2…
Modelling X-shaped Radio Galaxies: Dynamical and Emission Signatures from the Back-flow model
Gourab Giri, Bhargav Vaidya, Paola Rossi +3
Some of the radio galaxies show distortion in their jets, forming tailed or winged sources. X-shaped radio galaxies are a subclass of winged sources formation mechanism of which is…