Abstract

Type Ia Supernovae (SNe Ia) are the most common probes used to infer distances in current cosmological analyses. However, as their magnitude exhibits a natural scatter, SNe Ia need to be standardised in order to make the derived distance measurements accurate enough for cosmology. I will first introduce briefly SNe Ia and their use in cosmology. Secondly, I will present the ZTF survey and its DR2 Type Ia supernovae sample. With already more than 3,000 SNe Ia ready for cosmology, ZTF will be in future years the state-of-the-art low-redshift sample needed to anchor Stage IV supernovae surveys, e.g. LSST . I will finally present my work on the distributions of SNe Ia parameters (stretch and colour) and the standardisation relations found in ZTF , and how they depend on SNe Ia astrophysical environment.