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 language | English |
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Pages (from-to) | 3113-3118 |
Number of pages | 6 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 415 |
Issue number | 4 |
DOIs | |
State | Published - Aug 2011 |
Keywords
- Cosmology: theory
- Galaxies: formation
- Large-scale structure of Universe