Journal Article

Scale-dependent bias of galaxies from baryonic acoustic oscillations

Rennan Barkana and Abraham Loeb

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 415, issue 4, pages 3113-3118
Published in print August 2011 | ISSN: 0035-8711
Published online August 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.18922.x
Scale-dependent bias of galaxies from baryonic acoustic oscillations

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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.

Keywords: galaxies: formation; cosmology: theory; large-scale structure of Universe

Journal Article.  4210 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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