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Novel Model of an Ultra-stripped Supernova Progenitor of a Double Neutron Star
- Source :
- Astrophysical Journal Letters (2021) 920, L36
- Publication Year :
- 2021
-
Abstract
- Recent discoveries of double neutron star (DNS) mergers and ultra-stripped supernovae (SNe) raise the questions of their origin and connection. We present the first 1D~model of a DNS progenitor system which is calculated self-consistently until an ultra-stripped iron core collapse. We apply the \texttt{MESA} code starting from a post-common envelope binary consisting of a $1.35\;M_\odot$ NS and a $3.20\;M_\odot$ zero-age main-sequence helium star and continue the modelling via Case~BB Roche-lobe overflow until the infall velocity of the collapsing iron core exceeds $1000\;{\rm km\,s}^{-1}$. The exploding star has a total mass of $\sim 1.90\;M_\odot$, consisting of a $\sim 0.29\;M_\odot$ He-rich envelope embedding a CO core of $\sim 1.61\;M_\odot$ and an iron-rich core of $\sim 1.50\;M_\odot$. The resulting second-born NS has an estimated mass of $\sim 1.44\;M_\odot$ and we discuss the fate of the post-SN system, as well as the mild recycling of the first-born NS. Depending on the initial conditions, this family of systems is anticipated to reproduce the DNS mergers detected by the LIGO-network.<br />Comment: 8 pages, 5 figures, ApJL in press
Details
- Database :
- arXiv
- Journal :
- Astrophysical Journal Letters (2021) 920, L36
- Publication Type :
- Report
- Accession number :
- edsarx.2110.02979
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.3847/2041-8213/ac2cc9