Abstract Details
| Name: Barenya Dev Affiliation: Manipal Centre for Natural Sciences, Manipal Academy of Higher Education Conference ID: ASI2025_628 Title : A Multi-Frequency Investigation of the S-shaped Radio Galxy IC2402: A Restarted or Precessing Jet? Authors and Co-Authors : Barenya Kumar Dev 1, Sumana Nandi 1, Surajit Paul 1, Suman Chatterjee 2 Abstract Type : Poster Abstract Category : Galaxies and Cosmology Abstract : Double-double radio galaxies (DDRGs) represent a unique subclass of restarted radio galaxies, with two distinct episodes of active galactic nucleus (AGN) activity, manifested as two pairs of radio lobes which are usually co-linear. However, disentangling this restarting jet activity from the complex structures formed due to jet/counter-jet precession (twisted or knotted jets) is challenging as it needs sensitive and high-resolution multi-frequency data. The previous studies of the radio source J0847+3147, hosted by the brightest cluster galaxy IC 2402 in the relaxed cluster WHL J084759.0+314708 at a redshift of $z = 0.067$, have classified it as a DDRG based on a low-sensitive VLA FIRST image. However, archival Giant meterwave Radio Telescope (GMRT) data (325 MHz) and Very Large Array Sky Survey (VLASS) data (3 GHz) rather indicates a twisted/bent jet type of morphology for this source. In this study, we present upgraded GMRT (uGMRT) observations of the S-shaped radio galaxy IC 2402 at 650 MHz and 1.4 GHz. A detailed morphological analysis reveals inner jets resembling a Fanaroff-Riley type II (FRII) structure, multiple jet knots, and diffuse outer lobes. We conduct a multi-frequency spectral aging analysis and incorporate a kinematic jet precession modeling to investigate the source's activity history, and S-shaped morphology. |