Environments of type Ia supernovae in terms of Si II velocities with Integral Field Spectroscopy

The study of host galaxies is key to understand the progenitors and the physical mechanisms that originate type Ia supernovae. There is evidence that shows that the spectral characteristics of the supernovae are correlated with the physical properties of the environment. Specifically, the relationship between the silicon photospheric velocity and the properties of the galaxy suggests that high-velocity supernovae (v_si II > 12.000 km/s) may occur in massive environments and could have a sub-Chandrashekar progenitor (Pan et al. 2020). In this work, we present the analysis of local and global scale environments of +300 type Ia supernovae with measured photospheric silicon velocities from early-spectra. Employing Integral Field Spectroscopy host galaxy observations from PMAS, MaNGA and MUSE we obtain that high-velocity supernovae can also be found in low and medium-mass galaxies as well as in low-metallicity environments. We conclude that the correlation between the Si II velocities and the environment may exist but also be affected by observational biases towards high-mass galaxies, in agreement with Burgaz et al. 2024.