Fig. 3: Hubble diagram.
From: CIGaRS I: combined simulation-based inference from type Ia supernovae and host photometry
Top: redshift distributions of galaxies (according to Prospector-β), type Ia supernovae within them (as predicted by our DTD-based model) and detected type Ia supernovae (using our LSST-inspired selection function). While the latter two are on the same scale, the galaxy counts have been renormalized for clarity. Bottom: offsets of the extrinsic (dust-affected) and intrinsic absolute magnitudes (\({M}_{{\rm{ext}}}^{s}\) and \({M}_{{\rm{int}}}^{s}\)) from the standard M0 and the host- and progenitor-related δMs as functions of redshift. Points represent \({M}_{{\rm{ext}}}^{s}\) from our mock data (undetected supernovae are shown in a lighter shade). The shaded areas indicate the mean ± standard deviation—for detected supernovae—of the respective quantities binned by zc. The dashed lines delineate the irreducible and residual scatter with standard deviation σ0 intrinsic in the type Ia supernova population.
