Scale-dependent bias of galaxies from baryonic acoustic oscillations

Rennan Barkana*, Abraham Loeb

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Baryonic acoustic oscillations (BAOs) modulate the density ratio of baryons to dark matter across large regions of the Universe. We show that the associated variation in the mass-to-light ratio of galaxies should generate an oscillatory, scale-dependent bias of galaxies relative to the underlying distribution of dark matter. A measurement of this effect would calibrate the dependence of the characteristic mass-to-light ratio of galaxies on the baryon mass fraction in their large-scale environment. This bias, though, is unlikely to significantly affect measurements of BAO peak positions.

Original languageEnglish
Pages (from-to)3113-3118
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Volume415
Issue number4
DOIs
StatePublished - Aug 2011

Keywords

  • Cosmology: theory
  • Galaxies: formation
  • Large-scale structure of Universe

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