Vol 19, No 8 (2019) / Zhou

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The local properties of supernova explosions and their host galaxies

Li Zhou, Yan-Chun Liang, Jun-Qiang Ge, Xu Shao, Xiao-Yan Chen, Li-Cai Deng

Abstract

We aim to understand the properties at the locations of supernova (SN) explosions in their host galaxies and compare with the global properties of these host galaxies. We use the integral field spectrograph (IFS) of Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) to generate 2D maps of the parameter properties for 11 SN host galaxies. The sample galaxies are analyzed one by one in detail in terms of their properties of velocity field, star formation rate, oxygen abundance, stellar mass, etc. This sample of SN host galaxies has redshifts around z ∼ 0.03, which is higher than those of previous related works. The higher redshift distribution allows us to obtain the properties of more distant SN host galaxies. Metallicity (gas-phase oxygen abundance) estimated from integrated spectra can represent the local metallicity at SN explosion sites with small bias. All the host galaxies in our sample are metal-rich galaxies (12+log(O/H)> 8.5) except for NGC 6387, which means SNe may be more inclined to explode in metallicity-rich galaxies. There is a positive relation between global gas-phase oxygen abundance and the stellar mass of host galaxies. We also try to compare the differences of the host galaxies between SNe Ia and SNe II. In our sample, both SNe Ia and SNe II can explode in normal galaxies, but SNe II can also explode in an interacting or a merging system, in which star formation is occurring in the galaxy.

Keywords


galaxies: abundances — galaxies: general — galaxies: stellar content — supernovae: general — techniques: spectroscopic

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DOI: https://doi.org/10.1088/1674–4527/19/8/121

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