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Galactic constraints on supernova progenitor models

Acharova, I. A.; Gibson, B. K.; Mishurov, Yu N.; Kovtyukh, V. V.

Authors

I. A. Acharova

B. K. Gibson

Yu N. Mishurov

V. V. Kovtyukh



Abstract

Aims. To estimate the mean masses of oxygen and iron ejected per each type of supernovae (SNe) event from observations of the elemental abundance patterns in the Galactic disk and constrain the relevant SNe progenitor models. Methods. We undertake a statistical analysis of the radial abundance distributions in the Galactic disk within a theoretical framework for Galactic chemical evolution which incorporates the influence of spiral arms. This framework has been shown to recover the non-linear behaviour in radial gradients, the mean masses of oxygen and iron ejected during SNe explosions to be estimated, and constraints to be placed on SNe progenitor models. Results. (i) The mean mass of oxygen ejected per core-collapse SNe (CC SNe) event (which are concentrated within spiral arms) is ̃0.27 M⊙ (ii) the mean mass of iron ejected by tardy Type Ia SNe (SNeIa, whose progenitors are older/longer-lived stars with ages ≥100 Myr and up to several Gyr, which do not concentrate within spiral arms) is ̃0.58 M⊙ (iii) the upper mass of iron ejected by prompt SNeIa (SNe whose progenitors are younger/shorter-lived stars with ages ≤100 Myr, which are concentrated within spiral arms) is =0.23 M per event; (iv) the corresponding mean mass of iron produced by CC SNe is ≤0.04 M⊙per event; (v) short-lived SNe (core-collapse or prompt SNeIa) supply ̃85% of the Galactic disk's iron. Conclusions. The inferred low mean mass of oxygen ejected per CC SNe event implies a low upper mass limit for the corresponding progenitors of ̃23 M⊙, otherwise the Galactic disk would be overabundant in oxygen. This inference is the consequence of the nonlinear dependence between the upper limit of the progenitor initial mass and the mean mass of oxygen ejected per CC SNe explosion. The low mean mass of iron ejected by prompt SNeIa, relative to the mass produced by tardy SNeIa (̃2.5 times lower), prejudices the idea that both sub-populations of SNeIa have the same physical nature. We suggest that, perhaps, prompt SNeIa are more akin to CC SNe, and discuss the implications of such a suggestion. © 2013 ESO.

Citation

Acharova, I. A., Gibson, B. K., Mishurov, Y. N., & Kovtyukh, V. V. (2013). Galactic constraints on supernova progenitor models. Astronomy and Astrophysics, 557, A107. https://doi.org/10.1051/0004-6361/201220944

Journal Article Type Article
Acceptance Date Jul 2, 2013
Online Publication Date Sep 11, 2013
Publication Date Sep 20, 2013
Deposit Date Jul 16, 2018
Journal ASTRONOMY & ASTROPHYSICS
Print ISSN 0004-6361
Publisher EDP Sciences
Peer Reviewed Peer Reviewed
Volume 557
Article Number ARTN A107
Pages A107
DOI https://doi.org/10.1051/0004-6361/201220944
Keywords Galaxies: abundances; stars: massive; supernovae: general
Public URL https://hull-repository.worktribe.com/output/541931
Publisher URL https://www.aanda.org/articles/aa/abs/2013/09/aa20944-12/aa20944-12.html
Contract Date Jul 16, 2018