Impact of scalar spectral index on weak lensing cosmology

Kevin Hong

We investigate the sensitivity of the expected weak gravitational lensing measurements from the ten-year Rubin survey to the initial conditions of our Universe. Currently, standard cosmological analyses generally assume a wide large prior on the scalar spectral index of the initial matter distribution, although this parameter has been measured precisely by cosmic microwave background measurements. However, we are starting to see indications in the literature that current and future weak lensing measurements might be sensitive to this parameter. We therefore forecast the sensitivity of LSST weak lensing cosmology to the scalar spectral index, to quantify its importance in LSST-DESC future cosmological analyses.


This poster will be displayed on Monday and Tuesday.


Career Stage: 
Undergrad Student