Résumé du preprint DAPNIA-07-10

Weak Lensing of Baryon Acoustic Oscillations
A. Vallinotto, S. Dodelson, C. Schimd, J.-P. Uzan
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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