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- W2197658474 abstract "We propose a new way of looking at the Baryon Acoustic Oscillation in the large-scale-structure clustering correlation function. We identify a scale sLP that has two fundamental features: its position is insensitive to non-linear gravity, redshift-space distortions and scale-dependent bias at the 0.5 per cent level; it is geometrical, i.e. independent of the power spectrum of the primordial density fluctuation parameters. These two properties together make sLP, called the ‘linear point’, an excellent cosmological standard ruler. The linear point is also appealing because it is easily identified irrespectively of how non-linearities distort the correlation function. Finally, the correlation function amplitude at sLP is similarly insensitive to non-linear corrections to within a few per cent. Hence, exploiting the particular baryon features in the correlation function, we propose three new estimators for growth measurements. A preliminary analysis of sLP in current data is encouraging." @default.
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- W2197658474 date "2015-11-23" @default.
- W2197658474 modified "2023-10-17" @default.
- W2197658474 title "Beating non-linearities: improving the baryon acoustic oscillations with the linear point" @default.
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- W2197658474 doi "https://doi.org/10.1093/mnras/stv2436" @default.
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