期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 415, 期 4, 页码 3113-3118出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2966.2011.18922.x
关键词
galaxies: formation; cosmology: theory; large-scale structure of Universe
资金
- US-Israel Binational Science Foundation [2004386]
- Israel Science Foundation [823/09]
- NSF [AST-0907890]
- NASA [NNX08AL43G, NNA09DB30A]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [2004386] Funding Source: National Science Foundation
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.
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