Event calendar file
State of the Universe
On the detection of a cosmic dawn signal in the radio background
by Dr. Saurabh Singh (Raman Research Institute, Bangalore)
Friday, January 21, 2022
from
to
(Asia/Kolkata)
at Zoom Meeting: https://us02web.zoom.us/j/82512956967?pwd=angyQ0ZDdHZUdzFUbjkybmxsWFNFUT09 Meeting ID: 825 1295 6967 Passcode: 384194
at Zoom Meeting: https://us02web.zoom.us/j/82512956967?pwd=angyQ0ZDdHZUdzFUbjkybmxsWFNFUT09 Meeting ID: 825 1295 6967 Passcode: 384194
| Description |
EDGES collaboration reported detection of an anomalous profile, which was interpreted to be a 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 the 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. |
