Low-Frequency Measurements of the CMB Spectrum

As part of an extended program to characterize the spectrum of the cosmic microwave background (CMB) at low frequencies, we have performed multiple measurements from a high‐altitude site in Calfornia. On average, these measurements suggests a CMB temperature slightly lower than measurements at highe...

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Bibliographic Details
Published in:AIP Conference Proceedings
Main Authors: Smoot, George F., Bensadoun, Marc J., Bersanelli, Marco, Bonelli, Giuseppe, De Amici, Giovanni, Kogut, Alan J., Limon, Michele, Sironi, Giorgio, Vinje, William E.
Format: Conference Object
Language:English
Published: 1989
Subjects:
Amundsen-Scott
South Pole
South pole
Online Access:http://repository.ust.hk/ir/Record/1783.1-81976
https://doi.org/10.1063/1.38995
http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=&rft.volume=&rft.issue=&rft.date=1989&rft.spage=&rft.aulast=Smoot&rft.aufirst=George%20F.&rft.atitle=Low-Frequency%20Measurements%20of%20the%20CMB%20Spectrum&rft.title=Astrophysics%20in%20Antarctica%20Conference,%20Newark,%20Delaware,%208-10%20June%201989
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Summary:As part of an extended program to characterize the spectrum of the cosmic microwave background (CMB) at low frequencies, we have performed multiple measurements from a high‐altitude site in Calfornia. On average, these measurements suggests a CMB temperature slightly lower than measurements at higher frequencies. Atmospheric conditions and the encroachment of civilization are now significant limitations from our present observing site. In November 1989, we will make new measurements from the South Pole Amundsen‐Scott Station at frequencies 0.82, 1.5, 2.5, 3.8, 7.5, and 90 GHz. We discuss recent measurements and indicate improvements possible from a polar observing site.

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