Physical conditions and element abundances in SN and GRB host galaxies at different redshifts

TL;DR

This study compares physical conditions and element abundances in supernova and gamma-ray burst host galaxies across different redshifts, revealing differences in shock velocities, metallicities, and starburst temperatures.

Contribution

It provides detailed modeling of spectra to compare physical parameters and element abundances in SN and GRB host galaxies, highlighting key differences.

Findings

Shock velocities are lower in LGRB hosts than in SN hosts.

O/H abundance is near solar in LGRB hosts, more scattered in SN hosts.

Starburst temperatures vary, reaching >10^5 K in some SN hosts.

Abstract

We compare the physical parameters and the relative abundances calculated throughout supernova (SN) and gamma-ray burst (GRB) host galaxies by the detailed modelling of the spectra. The results show that : 1) shock velocities are lower in long period GRB (LGRB) than in SN host galaxies. 2) O/H relative abundance in SN hosts are scattered within a range 8.0 <12+log(O/H)<8.85 but they are close to solar in LGRB hosts. N/H are lower than solar for both SN and LGRB. 3) The starburst temperatures within a few SN hosts reach Ts >10^5 K. Ts in LGRB hosts are 3-8 10^4 K. 4) Ha increases with the ionization parameter U. We suggest that SN-host symbiosis is stronger in terms of host galaxy activity than GRB-host in the range of energies related to the near UV - optical - near IR spectra.