Contribution of Extragalactic Infrared Sources to CMB Foreground Anisotropy

Details Contribution of Extragalactic Infrared Sources to CMB Foreground Anisotropy Contribution of Extragalactic Infrared Sources to CMB Foreground Anisotropy

1996-03-22

arxiv.org/abs/astro-ph/9603121v2

Astrophys.J. 480 (1997) L1-L4

Astronomy and Astrophysics

Astrophysics

14 pages (LaTex source), 3 PostScript figures. Final version, to appear in ApJLetters May 1. Expanded discussion of systematic

Scientific paper

10.1086/310610

We estimate the level of confusion to Cosmic Microwave Background anisotropy measurements caused by extragalactic infrared sources. CMB anisotropy observations at high resolution and high frequencies are especially sensitive to this foreground. We use data from the COBE satellite to generate a Galactic emission spectrum covering mm and sub-mm wavelengths. Using this spectrum as a template, we predict the microwave emission of the 5319 brightest infrared galaxies seen by IRAS. We simulate skymaps over the relevant range of frequencies (30-900 GHz) and instrument resolutions (10'-10 degrees Full Width Half Max). Analysis of the temperature anisotropy of these skymaps shows that a reasonable observational window is available for CMB anisotropy measurements.

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