Speaker
Mr
Camilo Crisman
(CBPF)
Description
Type Ia supernova magnitudes are correlated due to their peculiar velocities, which are sourced by the large-scale structure of the Universe. This effect provides a way to probe the growth of structures and the distribution of matter, with strong potential in light of upcoming, larger supernova catalogues. In this talk, I analyze the Pantheon+ and DES-Y5 samples in combination with Planck CMB data to constrain the amplitude of matter fluctuations, the growth index, and spatial curvature. Supernovae and CMB data are shown to be highly complementary, enabling joint constraints on these parameters. The results indicate hints of non-zero curvature beyond the standard model, while remaining consistent with General Relativity.
Author
Mr
Camilo Crisman
(CBPF)