Observing Baryonic Acoustic Oscillations in tomographic cosmic shear surveys

TL;DR

This paper demonstrates that baryonic acoustic oscillations can be detected in tomographic cosmic shear surveys through a nulling transformation, with detection prospects depending on survey parameters.

Contribution

It introduces a method to observe BAO features in cosmic shear data using nulling transformations, quantifying detection feasibility in upcoming wide surveys.

Findings

BAO features can be reconstructed in cosmic shear power spectra.

Detection is feasible with modest signal-to-noise in wide surveys like Euclid or LSST.

Deeper surveys significantly improve BAO detection prospects.

Abstract

We show that it is possible to build effective matter density power spectra in tomographic cosmic shear observations that exhibit the Baryonic Acoustic Oscillations (BAO) features once a nulling transformation has been applied to the data. The precision with which the amplitude and position of these features can be reconstructed is quantified in terms of sky coverage, intrinsic shape noise, median source redshift and number density of sources. BAO detection in Euclid or LSST like wide surveys will be possible with a modest signal-to-noise ratio. It would improve dramatically for slightly deeper surveys.