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- W4313263245 abstract "ABSTRACT In this Letter, using classified 197 supernovae (SNe) Ia, we perform an analysis of their height distributions from the disc in edge-on spirals and investigate their light-curve (LC) decline rates (Δm15). We demonstrate, for the first time, that 91T- and 91bg-like subclasses of SNe Ia are distributed differently toward the plane of their host disc. The average height from the disc and its comparison with scales of thin/thick disc components gives a possibility to roughly estimate the SNe Ia progenitor ages: 91T-like events, being at the smallest heights, originate from relatively younger progenitors with ages of about several 100 Myr, 91bg-like SNe, having the highest distribution, arise from progenitors with significantly older ages ∼10 Gyr, and normal SNe Ia, which distributed between those of the two others, are from progenitors of about one up to ∼10 Gyr. We find a correlation between LC decline rates and SN Ia heights, which is explained by the vertical age gradient of the stellar population in discs and a sub-Chandrasekhar mass white dwarf explosion models, where the Δm15 parameter is a progenitor age indicator." @default.
- W4313263245 created "2023-01-06" @default.
- W4313263245 creator A5050828963 @default.
- W4313263245 date "2022-12-19" @default.
- W4313263245 modified "2023-09-25" @default.
- W4313263245 title "Constraining Type Ia supernovae through their heights in edge-on galaxies" @default.
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- W4313263245 doi "https://doi.org/10.1093/mnrasl/slac163" @default.
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