English

Aluminium-26 from massive binary stars III. Binary stars up to core-collapse and their impact on the early Solar System

Solar and Stellar Astrophysics 2023-08-02 v1

Abstract

Many of the short-lived radioactive nuclei that were present in the early Solar System can be produced in massive stars. In the first paper in this series (Brinkman et al. 2019), we focused on the production of 26^{26}Al in massive binaries. In our second paper (Brinkman et al. 2021), we considered rotating single stars, two more short-lived radioactive nuclei, 36^{36}Cl and 41^{41}Ca, and the comparison to the early Solar System data. In this work, we update our previous conclusions by further considering the impact of binary interactions. We used the MESA stellar evolution code with an extended nuclear network to compute massive (10-80 M _{\odot} ), binary stars at various initial periods and solar metallicity (Z=0.014), up to the onset of core collapse. The early Solar System abundances of 26^{26}Al and 41^{41}Ca can be matched self-consistently by models with initial masses \geq25 M_{\odot}, while models with initial primary masses \geq35 M_{\odot} can also match 36^{36}Cl. Almost none of the models provide positive net yields for 19^{19}F, while for 22^{22}Ne the net yields are positive from 30 M_{\odot} and higher. This leads to an increase by a factor of approximately 4 in the amount of 22^{22}Ne produced by a stellar population of binary stars, relative to single stars. Also, besides the impact on the stellar yields, our 10 M_{\odot} primary star undergoing Case A mass-transfer ends its life as a white dwarf instead of as a core-collapse supernova. This demonstrates that binary interactions can also strongly impact the evolution of stars close to the supernova boundary.

Keywords

Cite

@article{arxiv.2305.16787,
  title  = {Aluminium-26 from massive binary stars III. Binary stars up to core-collapse and their impact on the early Solar System},
  author = {Hannah E. Brinkman and C. L. Doherty and M. Pignatari and O. R. Pols and M. Lugaro},
  journal= {arXiv preprint arXiv:2305.16787},
  year   = {2023}
}

Comments

23 pages, 10 figures, 3 tables