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Title: An Analysis of Recent Measurements of the Temperature of theCosmic Microwave Background Radiation

Abstract

This paper presents an analysis of the results of recent temperature measurements of the cosmic microwave background radiation (CMBR). The observations for wavelengths longer than 0.1 cm are well fit by a blackbody spectrum at 2.74 {+-} 0.02 K; however, including the new data of Matsumoto et al. (1987) the result is no longer consistent with a Planckian spectrum. The data are described by a Thomson-distortion parameter u = 0.021 {+-} 0.002 and temperature 2.823 {+-} 0.010 K at the 68% confidence level. Fitting the low-frequency data to a Bose-Einstein spectral distortion yields a 95% confidence level upper limit of 1.4 x 10{sup -2} on the chemical potential {mu}{sub 0}. These limits on spectral distortions place restrictions on a number of potentially interesting sources of energy release to the CMBR, including the hot intergalactic medium proposed as the source of the X-ray background.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE Director, Office of Science
OSTI Identifier:
893044
Report Number(s):
LBL-23781
Journal ID: ISSN 0004-637X; ASJOAB; TRN: US200625%%74
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 331; Related Information: Journal Publication Date: 1988
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; RADIATIONS; RELICT RADIATION; TEMPERATURE MEASUREMENT; WAVELENGTHS

Citation Formats

Smoot, G., Levin, S.M., Witebsky, C., De Amici, G., and Rephaeli, Y.. An Analysis of Recent Measurements of the Temperature of theCosmic Microwave Background Radiation. United States: N. p., 1987. Web.
Smoot, G., Levin, S.M., Witebsky, C., De Amici, G., & Rephaeli, Y.. An Analysis of Recent Measurements of the Temperature of theCosmic Microwave Background Radiation. United States.
Smoot, G., Levin, S.M., Witebsky, C., De Amici, G., and Rephaeli, Y.. Wed . "An Analysis of Recent Measurements of the Temperature of theCosmic Microwave Background Radiation". United States. doi:. https://www.osti.gov/servlets/purl/893044.
@article{osti_893044,
title = {An Analysis of Recent Measurements of the Temperature of theCosmic Microwave Background Radiation},
author = {Smoot, G. and Levin, S.M. and Witebsky, C. and De Amici, G. and Rephaeli, Y.},
abstractNote = {This paper presents an analysis of the results of recent temperature measurements of the cosmic microwave background radiation (CMBR). The observations for wavelengths longer than 0.1 cm are well fit by a blackbody spectrum at 2.74 {+-} 0.02 K; however, including the new data of Matsumoto et al. (1987) the result is no longer consistent with a Planckian spectrum. The data are described by a Thomson-distortion parameter u = 0.021 {+-} 0.002 and temperature 2.823 {+-} 0.010 K at the 68% confidence level. Fitting the low-frequency data to a Bose-Einstein spectral distortion yields a 95% confidence level upper limit of 1.4 x 10{sup -2} on the chemical potential {mu}{sub 0}. These limits on spectral distortions place restrictions on a number of potentially interesting sources of energy release to the CMBR, including the hot intergalactic medium proposed as the source of the X-ray background.},
doi = {},
journal = {Astrophysical Journal},
number = ,
volume = 331,
place = {United States},
year = {Wed Jul 01 00:00:00 EDT 1987},
month = {Wed Jul 01 00:00:00 EDT 1987}
}