Contribution of Extragalactic Infrared Sources to Cosmic Microwave Background Foreground Anisotropy | Zendy

Eric Gawiser | Zendy; George F. Smoot | Zendy

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Contribution of Extragalactic Infrared Sources to Cosmic Microwave Background Foreground Anisotropy

Author(s) -

Eric Gawiser,

George F. Smoot

Publication year - 1997

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 - 10.1086/310610

Subject(s) - cosmic microwave background , physics , sky , astrophysics , anisotropy , cosmic infrared background , infrared , galaxy , microwave , astronomy , millimeter , optics , quantum mechanics

We estimate the level of confusion to Cosmic Microwave Background anisotropymeasurements caused by extragalactic infrared sources. CMB anisotropyobservations at high resolution and high frequencies are especially sensitiveto this foreground. We use data from the COBE satellite to generate a Galacticemission spectrum covering mm and sub-mm wavelengths. Using this spectrum as atemplate, we predict the microwave emission of the 5319 brightest infraredgalaxies seen by IRAS. We simulate skymaps over the relevant range offrequencies (30-900 GHz) and instrument resolutions (10'-10 degrees Full WidthHalf Max). Analysis of the temperature anisotropy of these skymaps shows that areasonable observational window is available for CMB anisotropy measurements.Comment: 14 pages (LaTex source), 3 PostScript figures. Final version, to appear in ApJLetters May 1. Expanded discussion of systematic error

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