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  The 50–100 pc scale parent stellar populations of Type II supernovae and limitations of single star evolution models

Schady, P., Eldridge, J. J., Anderson, J., Chen, T.-W., Galbany, L., Kuncarayakti, H., et al. (2019). The 50–100 pc scale parent stellar populations of Type II supernovae and limitations of single star evolution models. Monthly Notices of the Royal Astronomical Society, 490(4), 4515-4535. doi:10.1093/mnras/stz2843.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-909D-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-909E-6
Genre: Journal Article

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Schady, P.1, Author              
Eldridge, J. J., Author
Anderson, J., Author
Chen, T.-W.1, Author              
Galbany, L., Author
Kuncarayakti, H., Author
Xiao, L., Author
Affiliations:
1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 Abstract: There is observational evidence of a dearth in core-collapse supernova (ccSN) explosions from stars with zero-age main-sequence (ZAMS) mass M0 ≈ 17–30M, referred to as the ‘red supergiant problem’. However, simulations now predict that above 20 M we should indeed only expect stars within certain pockets of M0 to produce a visible SN explosion. Validating these predictions requires large numbers of ccSNe of different types with measured M0, which is challenging. In this paper, we explore the reliability of using host galaxy emission lines and the H α equivalent width to constrain the age, and thus the M0 of ccSNe progenitors. We use Binary Population and Spectral Synthesis models to infer a stellar population age from MUSE observations of the ionized gas properties and H α EW at the location of eleven ccSNe with reliable M0 measurements. Comparing our results to published M0 values, we ind that models that do not consider binary systems yield stellar ages that are systematically too young (thus M0 too large), whereas accounting for binary system interactions typically overpredict the stellar age (thus underpredict M0). Taking into account the effects of photon leakage bring our M0 estimates in much closer agreement with expectations. These results highlight the need for careful modelling of diffuse environments, such as are present in the vicinity of Type II SNe, before ionized emission line spectra can be used as reliable tracers of progenitor stellar age.

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 Dates: 2019-10-12
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1093/mnras/stz2843
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Title: Monthly Notices of the Royal Astronomical Society
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Source Genre: Journal
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Publ. Info: OXFORD : OXFORD UNIV PRESS
Pages: - Volume / Issue: 490 (4) Sequence Number: - Start / End Page: 4515 - 4535 Identifier: ISSN: 0035-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000021470