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Title:
Double galaxy investigations. II - The redshift periodicity in optically observed pairs
Authors:
Tifft, W. G.
Affiliation:
AA(Steward Observatory, Tucson, AZ)
Publication:
Astrophysical Journal, Part 1, vol. 262, Nov. 1, 1982, p. 44-47. (ApJ Homepage)
Publication Date:
11/1982
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
Galaxies, Red Shift, Optical Emission Spectroscopy, Periodic Variations
DOI:
10.1086/160394
Bibliographic Code:
1982ApJ...262...44T

Abstract

The new sample of optically observed double galaxies is tested for the 72 km/sec periodicity. The periodicity is present in the 200 pair high weight sample at or above the 99% confidence level. Detection varies between subsamples in accord with variation in data uncertainty as expected. Uncertainties in delta-V inferred from the visibility of the periodicity are in close accord with directly determined internal delta-V errors. The result is not dependent upon inclusion or exclusion of the zero peak.

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