Limits on CMB Anisotropy from Point Sources

Details Limits on CMB Anisotropy from Point Sources Limits on CMB Anisotropy from Point Sources

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.1703g&link_type=abstract

American Astronomical Society, 192nd AAS Meeting, #17.03; Bulletin of the American Astronomical Society, Vol. 30, p.843

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Using basic physical principles and recent observational results, we derive upper and lower limits on microwave anisotropy from point sources over the range of frequencies 10-1000 GHz. We examine the level of noise in the observations as a possible indication of source confusion at subarcminute scales. We derive a robust upper limit on CMB foreground anisotropy caused by sources responsible for the Far-Infrared Background radiation detected in FIRAS data. Our upper limit on point source confusion is Delta T / T = 2 *E(-5) for a 10' beam at 100 GHz. It appears likely that point source confusion will limit the ability of future CMB anisotropy observations to measure the damping tail of the radiation power spectrum.

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