Abstract Details
| Name: Sumanta Kumar Sahoo Affiliation: National Institute of Technology, Rourkela Conference ID: ASI2018_1590 Title : Discoveries from GMRT by RAD@home citizen-scientists: Three intriguing cases of jet-galaxy interaction as laboratory for AGN feedback in galaxy merger Authors and Co-Authors : Co-Authors: Ananda Hota(1,2), Sumanta Ku Sahoo(2,3), Sravani Vaddi(2,4), Pradeepta Mohanty (2), Pratik dabhade(2,5,6), Marek Jamrozy(7), Huib Intema(8), Soo-Chang Rey (9), Ananta Ch. Pradhan(3), Chiranjib Konar(10), C S. Stalin(11), Sagar Sethi(2), Arpita Misra(2) Affiliations: 1. UM-DAE Centre for Excellence in Basic Sciences, Mumbai-98, India 2. RAD@home Astronomy Collaboratory, India 3. National Institute of Technology, Rourkela, Odisha, India 4. National Centre for Radio Astrophysics, TIFR, Pune, India 5. Inter-University Centre for Astronomy & Astrophysics, Pune, India 6. Leiden University, Leiden, The Netherlands 7. Astronomical Observatory, Jagiellonian University, Poland 8. Leiden Observatory, Leiden University, Leiden, The Netherlands 9. Chungnam National University, Daejeon 34134, Korea 10. Amity University, Noida, India 11. Indian Institute of Astrophysics, Bangalore, India Abstract Type : Poster Abstract Category : Extragalactic astronomy Abstract : AGN-feedback has been a very critical incorporation in the models of merger-driven structure formation and galaxy and black hole co-evolution. Although the negative feedback model of quenching of star formation is highly popular, observational "smoking gun evidence" for such a process is still missing. Positive feedback through wind/jets triggering star formation has clearly been observed, but only in a very few cases. The proper mechanisms of such positive or negative feedback effects through jet-galaxy interactions are still poorly understood. RAD@home citizen-scientists have discovered three intriguing cases where a radio jet is seen to hit the neighbouring interacting/merging galaxy, but no apparent triggered star formation is occurring. The first case is an ongoing dry merger of two ellipticals, showing a unique case of repeated radio jet episodes from one galaxy, where one side of the jet seems to have hit the companion galaxy. The second case is probably an elliptical-elliptical interaction, where a jet from one galaxy seems to be deflected from the outer boundary of the companion elliptical. The final case appears to be an interaction between an elliptical and a spiral galaxy, where the radio jet from the elliptical shows sign of interaction with the spiral. |