Evolution and Final Fate of Solar Metallicity Stars in the Mass Range 7-15 M ⊙. I. The Transition from Asymptotic Giant Branch to Super-AGB Stars, Electron Capture, and Core-collapse Supernova Progenitors

Journal
Date Issued
2024
Author(s)
•
•
•
Nomoto, Ken’ichi
DOI
Abstract
According to a standard initial mass function, stars in the range 7-12 M ⊙ constitute ∼50% (by number) of the stars more massive than ∼7 M ⊙, but in spite of this, their evolutionary properties, and in particular their final fate, are still scarcely studied. In this paper, we present a detailed study of the evolutionary properties of solar metallicity nonrotating stars in the range 7-15 M ⊙, from the pre-main-sequence phase up to the presupernova stage or an advanced stage of the thermally pulsing phase, depending on the initial mass. We find that (1) the 7.00 M ⊙ star develops a degenerate CO core and evolves as a classical asymptotic giant branch (AGB) star in the sense that it does not ignite the C-burning reactions, (2) stars with initial mass M ≥ 9.22 M ⊙ end their lives as core-collapse supernovae, (3) stars in the range 7.50 ≤ M/M ⊙ ≤ 9.20 develop a degenerate ONeMg core and evolve through the thermally pulsing super-AGB phase, (4) stars in the mass range 7.50 ≤ M/M ⊙ ≤ 8.00 end their lives as hybrid CO/ONeMg or ONeMg WDs, and (5) stars with initial mass in the range 8.50 ≤ M/M ⊙ ≤ 9.20 may potentially explode as electron-capture supernovae.
Volume
270
Issue
2
Start page
29
Uri
Url
Issn Identifier
0067-0049
Rights
open.access
File(s)
Loading...
Thumbnail Image
Name

2024ApJS_270_29part1.pdf

Description
Articolo Prima Parte
Size

9.77 MB

Format

Adobe PDF

Checksum (MD5)

f9c633b405fda54ca636871d1613232b

Loading...
Thumbnail Image
Name

2024ApJS_270_29part2.pdf

Description
Articolo Seconda Parte
Size

7.01 MB

Format

Adobe PDF

Checksum (MD5)

fb98a49a0cc9aabda1cae611c34b19b4