Search Talks

Radio observations are essential for studying galaxy formation and evolution, yet analyzing low-frequency interferometric data is challenging due to radio frequency interference (RFI) contamination and other system issues. To streamline this process, we developed GARUDA, an automated pipeline for analyzing GMRT data, employing AI/ML-based algorithms for efficient RFI identification and artifact removal. GARUDA enables fast and consistent data reduction, handling ~10-12 GB GSB data in 20-30 minutes and ~400 GB GWB data in under three hours on standard servers. In this presentation, I will discuss GARUDA’s capabilities and showcase results, including some of the deepest GMRT radio continuum images at the L-band, HI emission in galaxies, and one of the most sensitive galactic HI absorption lines (using frequency switching observation with GWB).

Measurements of magnetic fields at the outskirts of galaxy clusters provide crucial insights into the evolution of cosmic magnetic fields. Radio relics are known to trace merger shocks in galaxy clusters propagating in the periphery of galaxy clusters. Many relics show a very high linear polarisation, which is puzzlingly aligned with the orientation of the relics. In this talk we will briefly review current research on radio relics and what these observations tell us about the structure and evolution of magnetic fields. We use Rotation Measure (RM) synthesis and QU fitting methods to spatially resolve the properties of the dominant components in Faraday space. I will show how these methods allow us to constrain the properties of the magnetic fields in the cluster outskirts through a combined analysis of Faraday depths and depolarisation.

In this talk, I will provide an update on the current status of the SKA Observatory, which is currently under construction. I will also describe the role of India in this project, and summarise the various activities going on in India, coordinated by the SKA India Consortium, towards India's participation in the SKAO.