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- Title
Metallicity distributions of core-collapse supernovae within 30Mpc: Evidence for a lack of single massive Ib progenitors at low metallicities.
- Authors
Pledger, Joanne L.; Ganss, Rudi; Sansom, Anne E.; James, Philip A.; Puls, Joachim; Habergham-Mawson, Stacey M.
- Abstract
Local HII environment metallicities of 65 supernovae (SNe), obtained with INT/IDS, have been determined using the N2 and O3N2 strong emission line methods. Resulting cumulative distribution functions reveal a narrower distribution for Ib SNe (standard deviation σ ∼ 0.06 dex) compared to Ic and IIP distributions (σ ∼ 0.15 dex). This narrow distribution of Ib SNe is confirmed with an extended dataset using data from Galbany et al. (2018). Statistical tests confirm a statistically significant difference between the Ib and II-P metallicity distributions with < 5% probability that they result from the same progenitors. This narrow distribution suggests a lack of Type Ib SNe in low metallicity environments and points towards single star progenitors for these Type Ib SNe, rather than binaries. It also suggests that single massive stars at low metallicity are not commonly able to produce helium-rich Type Ib supernovae.
- Subjects
TYPE I supernovae; CUMULATIVE distribution function; SUPERGIANT stars; SUPERNOVAE; STANDARD deviations
- Publication
Proceedings of the International Astronomical Union, 2022, Vol 18, Issue S361, p590
- ISSN
1743-9213
- Publication type
Article
- DOI
10.1017/S1743921322002964