Exploring the Large Scale Anisotropy in the Cosmic Microwave Background Radiation at 170 GHz

Details Exploring the Large Scale Anisotropy in the Cosmic Microwave Background Radiation at 170 GHz Exploring the Large Scale Anisotropy in the Cosmic Microwave Background Radiation at 170 GHz

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phdt........14g&link_type=abstract

PhD Dissertation, Princeton Univ. NJ United States

Astronomy and Astrophysics

Astronomy

4

Background Radiation, Far Infrared Radiation, Sky Surveys (Astronomy), Anisotropy, Infrared Astronomy, Cosmic Dust, Emission Spectra, Extremely High Frequencies, Universe, Big Bang Cosmology, Random Errors, Data Processing, Data Reduction, Astronomical Maps, Cross Correlation, Balloon-Borne Instruments, Cosmic Background Explorer Satellite

Scientific paper

In this thesis, data from the Far Infra-Red Survey (FIRS), a balloon-borne experiment designed to measure the large scale anisotropy in the cosmic microwave background radiation, are analyzed. The FIRS operates in four frequency bands at 170, 280, 480, and 670 GHz, using an approximately Gaussian beam with a 3.8 deg full-width-at-half-maximum. A cross-correlation with the COBE/DMR first-year maps yields significant results, confirming the DMR detection of anisotropy in the cosmic microwave background radiation. Analysis of the FIRS data alone sets bounds on the amplitude of anisotropy under the assumption that the fluctuations are described by a Harrison-Peebles-Zel'dovich spectrum and further analysis sets limits on the index of the primordial density fluctuations for an Einstein-DeSitter universe. Galactic dust emission is discussed and limits are set on the magnitude of possible systematic errors in the measurement.

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