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Title:
The velocity of clusters of galaxies relative to the microwave background. The possibility of its measurement
Authors:
SUNYAEV, R. A.; ZELDOVICH, Y. B.
Affiliation:
Academy of Sciences (USSR), Moscow.
Journal:
The velocity of clusters of galaxies relative to the microwave background. The possibility of its measurement
Publication Date:
00/1975
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
BACKGROUND RADIATION, GALACTIC CLUSTERS, MICROWAVE SCATTERING, VELOCITY MEASUREMENT, HIGH TEMPERATURE GASES, MICROWAVES, POLARIZED RADIATION, RADIAL VELOCITY, RADIO ASTRONOMY, THOMSON SCATTERING
Bibliographic Code:
1975N80-15007.....S

Abstract

The use of microwave background radiation intensity and polarization to determine the radial and tangential relative velocity components of clusters of galaxies is proposed. It is shown that measurements of (delta T/T) on 3 cm and 2 mm wavelengths, with a precision of several percent permits the detection of radial velocities on the order of our galaxy's motion relative to the microwave background. It is also shown that it is possible to find the tangential velocity component by measuring the polarization of the scattered radiation. The existence of two different polarization mechanisms is discussed. 
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