Coherent peculiar velocities and periodic redshifts

Details Coherent peculiar velocities and periodic redshifts Coherent peculiar velocities and periodic redshifts

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...366l..57h&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 366, Jan. 10, 1991, p. L57-L60. Research supported by DOE.

Astronomy and Astrophysics

Astrophysics

17

Peculiar Stars, Red Shift, Relic Radiation, Coherent Radiation, Periodic Variations, Power Spectra, Velocity Distribution

Scientific paper

A coherent, sinusoidal peculiar velocity field of 0.003 amplitude and wavelength of 128/h Mpc could explain the apparent redshift periodicity seen in the recent pencil-beam survey of Broadhurst et al. (1990). Such a peculiar velocity field could arise if the power spectrum of density perturbations has a strong feature at about this wavelength. This explanation has additional predictions: the phase, period, and strength of the periodicity should vary in different directions; the strength of the periodicity should decrease at higher redshifts; and there should be more 'thin' structures perpendicular to the line of sight than parallel to it.

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