[astroseminar at Sapienza] today at 16:00: Sofia Fatigoni
Elia Battistelli
elia.battistelli at roma1.infn.it
Thu Feb 23 10:51:17 CET 2023
Even if we encourage the live presence at the seminars, we would like to
share with you the link at which you could follow the seminar remotely.
Details below:
https://uniroma1.zoom.us/j/82330282429?pwd=MktKdmlkSUxxdXlraFhKSHhJTDZnUT09
Title: Constraining the Inflationary Universe from the South Pole
Speaker: Sofia Fatigoni
Institution: CALTECH (California Institute of Technology)
Date: Thursday Feb 23, 2023
Time: 4:00pm
Location: Aula Conversi, Marconi Building, Dept. of Physics, Sapienza
University
Abstract: The inflation theory states that the Universe arose from a
tiny volume, and underwent a super-luminar expansion when it was 1034s
old.
This mechanism would have left a distinct signal in its afterglow
radiation: the Cosmic Microwave Background. This signal is so faint that
an
extremely sensitive instrument and a high noise and systematics control
are required to capture it. We are building BICEP Array, a microwave
telescope which incorporates in its focal plane a high number of
responsive and low noise pixels. We are deploying it at the South Pole,
which
is one of the best sites on Earth for microwave observations. But even
so, atmospheric fluctuations contaminate our data. We have analised the
South Pole Atmosphere with an independent instrument, a water vapour
radiometer (WVR) located next to BICEP Array, and we have developed
a new method for atmospheric noise subtraction that doesn’t involve any
loss of information in our cosmological data.
web: https://agenda.infn.it/event/34380/
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