Abstract Details
| Name: Prasun Machado Affiliation: Department of Physics, SIES College of Arts, Science and Commerce (Autonomous), Sion (West), Mumbai, Maharashtra - 400022 (affiliated to University of Mumbai) Conference ID: ASI2025_613 Title : New structures in radio galaxies with RAD@home Citizen Science Authors and Co-Authors : Prasun Machado(1,2), Ananda Hota (3,2) Pratik Dabhade(4,2) Prakash Apoorva(2), Aarti Muley (1), Arundhati Purohit(2) Abstract Type : Poster Abstract Category : Galaxies and Cosmology Abstract : Radio galaxies demonstrate varied morphologies when relativistic jets, which are launched by accretion on to super massive black holes (SMBH), interact with the surrounding circumgalactic or intra cluster medium. Jets expanding outwards experience various processes like lateral ram pressure, vorticity and turbulence. Most of these morphologies can be easily classified as FR I, FR II, XRG, DDRG, WAT, NAT ,etc. Here, we present four unusual morphologies which do fall out of the standard categories of radio galaxies. They have been identified from the low frequency surveys like the LoTSS with LOFAR and TGSS with GMRT. (1) An unusual “collimated synchrotron thread (CST)” of linear size ~ 600 kpc was observed. It’s the third ever found CST, as per our literature survey. (2) We observe a rare doughnut-shaped swirl/ring at the end of linear radio filament. The linear size of this ring is ~ 90 kpc. (3) A radio jet “burl” is observed, at one of the lobes of an edge brightened FR II structure. The linear size of this burl is ~50-75 kpc. The “burl” is neither located at the extreme tip of the lobe nor near the core. The structure of this “burl” is very compact but different from U-shaped kinks (4) A diffuse blob of linear size ~420 kpc was observed at the northern side of a double lobed radio galaxy. Structure and alignment suggest it to be a relic lobe however the southern relic lobe counterpart is missing. We are presenting these four radio sources with an analysis based on multiwavelength data and the process of discovery through citizen science research collaboratory approach. |