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For refcode 1996A&A...310..353G:
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1996A&A...310..353G Redshift periodicity in the Local Supercluster B.N.G. Guthrie and W.M. Napier Royal Observatory, Blackford Hill. Edinburgh EH9 3HJ, Scotland, UK Present address: 5 Arden Street, Edinburgh EH9 1BR, Scotland, UK Present address: Armagh Observatory. College Hill, Armagh BT6l 9DG, N. Ireland, UK Received 20 June 1994/ Accepted 19 September 1995 Abstract. Persistent claims have been made over the last ~15 yr that extragalactic redshifts. when corrected for the Sun's motion around the Galactic centre, occur in multiples of ~24 or ~36 km s^-1^. A recent investigation by us of 40 spiral galaxies out to 1000 km s^-1^, with accurately measured redshifts, gave evidence of a periodicity ~37.2-37.7 km s^-1^. Here we extend our enquiry out to the edge of the Local Supercluster (~2600 km s^-1^), applying a simple and robust procedure to a total of 97 accurately determined redshifts. We find that, when corrected for related vectors close to recent estimates of the Sun's galactocentric motion, the redshifts of spirals are strongly periodic (P~37.6 km s^-1^). The formal confidence level of the result is extremely high, and the signal is seen independently with different radio telescopes. We also examine a further sample of 117 spirals observed with the 300-foot Green Bank telescope alone. The periodicity phenomenon appears strongest for the galaxies linked by group membership, but phase coherence probably holds over large regions of the Local Supercluster. Key words: galaxies: distances and redshifts - galaxies: spiral - radio lines: galaxies
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