| Name: | Yash Bhusare |
| Affiliation: | National Centre for Radio Astrophysics |
| Conference ID: | ASI2025_633 |
| Title: | Exploring the Local Environments of Repeating FRBs with uGMRT Observations |
| Authors: | Yash Bhusare, Yogesh Maan, Ajay Kumar |
| Authors Affiliation: | National Centre for Radio Astrophysics, pune, India |
| Mode of Presentation: | Oral |
| Abstract Category: | High Energy Phenomena, Fundamental Physics and Astronomy |
| Abstract: | Fast Radio Bursts (FRBs) are an enigmatic phenomenon. Since their discovery in 2007 many theoretical models have been proposed. With a rise in the number of FRB detections, observations are helping to constrain theoretical models. The discovery of Persistent Radio Sources (PRSs) associated with three repeating FRBs has provided unique clues about their local environments.
We have utilized the upgraded Giant Metrewave Radio Telescope (uGMRT) to conduct deep radio observations of the regions surrounding three highly active repeating FRBs: FRB 20220912A, FRB 20240114A, and FRB 20240619D. By imaging these fields at low frequencies using uGMRT Bands 3 (300-500 MHz) and 4 (550-850 MHz), we have explored the local environments of these FRBs and gain insights into their surroundings. Our observations reveal radio emission in the host galaxy of FRB 20220912A, likely linked to star formation. For FRB 20240619D, no PRS was detected, and we placed upper limits on the local radio emission. In the case of FRB 20240114A, we report the discovery of a potential PRS, supporting the correlation between the FRBs' rotation measure (RM) and their emission. We also used SDSS and WISE public dataset for estimating properties of the host galaxy. Following the developments at higher radio frequencies, this candidate will join a limited group of FRBs which have associated PRSs. We will discuss our findings, their implications for theoretical models, and how they fit into the overall picture of FRB-PRS pairs. |
