Speaker
Description
The redshifted 21 cm line is an emerging tool in cosmology that helps us understand the large-scale structure of the universe. Drift-scan observations, where the direction in which the telescope's point changes continuously on the sky due to the earth's rotation, provide an economical and stable option if one desires broad sky coverage. However, the Galactic and extra-galactic foreground become a severe challenge for the detection of the 21-cm signal. In this talk, I will present a novel estimator, namely the Tapered Gridded Estimator for measuring the 21-cm power spectrum from radio interferometric visibilities. Also, I will present our recent results using MWA phase II observations to characterize the diffuse Galactic foreground emission. This study will help to model the foreground properly, and also remove them accurately toward detecting the cosmological 21-cm signal.
