Coherent peculiar velocities and periodic redshifts

Christopher T. Hill, Paul J. Steinhardt, Michael S. Turner

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

A coherent, sinusoidal peculiar velocity field of amplitude δυ/c ≃ 3 × 10-3 and wavelength λ ≃ 128h-1 Mpc could explain the apparent redshift periodicity seen in the recent pencil-beam survey of Broadhurst et al. Such a peculiar velocity field could arise if the power spectrum of density perturbations has a strong feature at about this wavelength (e.g., a bump). 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.

Original languageEnglish (US)
Pages (from-to)L57-L60
JournalAstrophysical Journal
Volume366
Issue number2 PART 2
DOIs
StatePublished - Jan 10 1991
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Cosmic background radiation
  • Galaxies: Redshifts

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