The Impact of Atmospheric Fluctuations on Degree‐Scale Imaging of the Cosmic Microwave Background | Zendy

Oliver P. Lay | Zendy; N. W. Halverson | Zendy

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The Impact of Atmospheric Fluctuations on Degree‐Scale Imaging of the Cosmic Microwave Background

Author(s) -

Oliver P. Lay,

N. W. Halverson

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/317115

Subject(s) - cosmic microwave background , interferometry , physics , atmosphere (unit) , brightness , cosmic cancer database , angular diameter , microwave , anisotropy , degree (music) , noise (video) , brightness temperature , cosmic ray , remote sensing , environmental science , astrophysics , astronomy , optics , meteorology , geology , acoustics , stars , quantum mechanics , artificial intelligence , computer science , image (mathematics)

Fluctuations in the brightness of the Earth's atmosphere originating fromwater vapor are an important source of noise for ground-based instrumentsattempting to measure anisotropy in the Cosmic Microwave Background. This paperpresents a model for the atmospheric fluctuations and derives simpleexpressions to predict the contribution of the atmosphere to experimentalmeasurements. Data from the South Pole and from the Atacama Desert in Chile,two of the driest places on Earth, are used to assess the level of fluctuationsat each site.Comment: 29 pages, 7 figures, 1 table, appears in The Astrophysical Journa

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