The 6x2pt method: supernova velocities meet multiple tracers

Understand

We present a new methodology to analyse in a comprehensive way large-scale and supernovae (or any other distance indicator) surveys.

• Our approach combines galaxy and supernova position and redshift data with supernova peculiar velocities, obtained through their magnitude scatter, to construct a 6x2pt analysis which includes six power spectra.
• The 3x3 correlation matrix of these spectra expresses exhaustively the information content of the surveys at the linear level.
• We proceed then to forecast the performance of future surveys like LSST and 4MOST with a Fisher Matrix analysis, adopting both a model-dependent and a model-independent approach.