| 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: | Barenya Kumar Dev 1, Sumana Nandi 1, Surajit Paul 1, Suman Chatterjee 2 |
| Authors Affiliation: | 1 Manipal Centre for Natural Sciences, Manipal Academy of Higher Education, Manipal, Karnataka-576104, India
2 University of the Western Cape, Robert Sobukwe Rd, Bellville, Cape Town-7535, South Africa |
| Mode of Presentation: | 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. |
