Colloquium on Apr. 14, 2022

On the detection of a cosmic dawn signal in the radio background

Speaker: Saurabh Singh (RRI)

Venue: Video Conference

Time: 16:00 PM, Thursday, Apr. 14, 2022

Abstract:

EDGES collaboration reported detection of an anomalous profile, which was interpreted to be 21-cm signature arising from cosmic dawn. Several non-standard theoretical models were proposed to explain its origins, including dark matter-baryon interactions and excess radio background. We deployed SARAS 3 radiometer on lakes in Southern India to examine this claim. In this talk, I will discuss the unique design and observing environment of SARAS 3. I will present the statistical methods used to test for presence of the reported signal. I will conclude with our inference about the non-detection of the reported profile in SARAS 3 data and discuss its implications.

Report PPT:  SWIFAR_Saurabh Singh.pdf