Weak Lensing of Baryon Acoustic Oscillations

Details Weak Lensing of Baryon Acoustic Oscillations Weak Lensing of Baryon Acoustic Oscillations

2007-02-22

arxiv.org/abs/astro-ph/0702606v1

Phys.Rev.D75:103509,2007

Astronomy and Astrophysics

Astrophysics

10 pages, 4 figures

Scientific paper

10.1103/PhysRevD.75.103509

Baryon Acoustic Oscillations (BAO) have recently been observed in the distribution of distant galaxies. The height and location of the BAO peak are strong discriminators of cosmological parameters. Here we consider the ways in which weak gravitational lensing distorts the BAO signal. We find two effects that can affect the height of the BAO peak in the correlation function at the percent level but that do not significantly impact the position of the peak and the measurement of the sound horizon. BAO turn out to be robust cosmological standard rulers.

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