Mathematics – Probability
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.0513t&link_type=abstract
American Astronomical Society, 182nd AAS Meeting, #05.13; Bulletin of the American Astronomical Society, Vol. 25, p.796
Mathematics
Probability
5
Scientific paper
We investigate periodicities in redshift samples corrected for the apparent motion of the solar system relative to the cosmic background radiation. Referred to a coordinate system at rest with respect to the CBR, a sample of precise 21 cm data is periodic at 72.1 km s(-1) at a very high significance level, at least 99.99% formally. A search for periodicities in a large volume of velocity space shows other, random periodicities at a level consistent with the fact that the coincidence with the CBR rest frame is a very improbable occurrence. The sample used for the initial discovery is composed of data taken by Tifft and Tifft and Cocke at the 300-ft and 140-ft telescopes at Green Bank. Other data confirm the correspondance with the CBR rest frame; namely, 21 cm data by Giovanelli and Haynes and by Fisher and Tully. The former data set was analysed for galaxies with very wide 21 cm profiles and is periodic at 36.05 km s(-1) . The joint probability for all these coincidences is hard to evaluate, but is certainly < 10(-6) . Power spectrum analysis confirms the high significance levels and the precise correspondance with previously predicted periods.
Cocke William J.
Tifft William Grant
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