Measurement of the large-scale anisotropy of the cosmic background radiation at 3mm
Abstract
A balloon-borne differential radiometer has measured the large-scale anisotropy of the cosmic background radiation (CBR) with high sensitivity. The antenna temperature dipole anistropy at 90 GHz (3 mm wavelength) is 2.82 +- 0.19 mK, corresponding to a thermodynamic anistropy of 3.48 +- mK for a 2.7 K blackbody CBR. The dipole direction, 11.3 +- 0.1 hours right ascension and -5.7/sup 0/ +- 1.8/sup 0/ declination, agrees well with measurements at other frequencies. Calibration error dominates magnitude uncertainty, with statistical errors on dipole terms being under 0.1 mK. No significant quadrupole power is found, placing a 90% confidence-level upper limit of 0.27 mK on the RMS thermodynamic quadrupolar anistropy. 22 figures, 17 tables.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- OSTI Identifier:
- 5268291
- Report Number(s):
- LBL-17118
ON: DE84006774
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: Thesis
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BACKGROUND RADIATION; ANISOTROPY; COSMIC RADIATION; MICROWAVE RADIATION; BALLOONS; COSMOLOGY; EXPERIMENTAL DATA; MEASURING METHODS; AIRSHIPS; DATA; ELECTROMAGNETIC RADIATION; INFORMATION; IONIZING RADIATIONS; NUMERICAL DATA; RADIATIONS; 640106* - Astrophysics & Cosmology- Cosmology
Citation Formats
Epstein, G L. Measurement of the large-scale anisotropy of the cosmic background radiation at 3mm. United States: N. p., 1983.
Web. doi:10.2172/5268291.
Epstein, G L. Measurement of the large-scale anisotropy of the cosmic background radiation at 3mm. United States. https://doi.org/10.2172/5268291
Epstein, G L. 1983.
"Measurement of the large-scale anisotropy of the cosmic background radiation at 3mm". United States. https://doi.org/10.2172/5268291. https://www.osti.gov/servlets/purl/5268291.
@article{osti_5268291,
title = {Measurement of the large-scale anisotropy of the cosmic background radiation at 3mm},
author = {Epstein, G L},
abstractNote = {A balloon-borne differential radiometer has measured the large-scale anisotropy of the cosmic background radiation (CBR) with high sensitivity. The antenna temperature dipole anistropy at 90 GHz (3 mm wavelength) is 2.82 +- 0.19 mK, corresponding to a thermodynamic anistropy of 3.48 +- mK for a 2.7 K blackbody CBR. The dipole direction, 11.3 +- 0.1 hours right ascension and -5.7/sup 0/ +- 1.8/sup 0/ declination, agrees well with measurements at other frequencies. Calibration error dominates magnitude uncertainty, with statistical errors on dipole terms being under 0.1 mK. No significant quadrupole power is found, placing a 90% confidence-level upper limit of 0.27 mK on the RMS thermodynamic quadrupolar anistropy. 22 figures, 17 tables.},
doi = {10.2172/5268291},
url = {https://www.osti.gov/biblio/5268291},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 1983},
month = {Thu Dec 01 00:00:00 EST 1983}
}