R-process Nucleosynthesis of Subminimal Neutron Star Explosions

被引：2
|
作者：
Yip, Chun-Ming [1 ]
Chu, Ming-Chung [1 ]
Leung, Shing-Chi [2 ]
Lin, Lap-Ming [1 ]
机构：
[1] Chinese Univ Hong Kong, Inst Theoret Phys, Dept Phys, Shatin, Hong Kong, Peoples R China
[2] SUNY Polytech Inst, Dept Math & Phys, 100 Seymour Rd, Utica, NY 13502 USA
来源：
ASTROPHYSICAL JOURNAL | 2023年 / 956卷 / 02期
基金：
美国国家科学基金会;
关键词：
GRAVITATIONAL-WAVES; PROCESS ELEMENTS; MINIMUM MASS; ORIGIN; MERGER; DECOMPRESSION; CAPTURE; NUCLEI; IMPACT; EJECTA;
D O I：
10.3847/1538-4357/acf570
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We show that a minimum-mass neutron star undergoes delayed explosion after mass removal from its surface. We couple the Newtonian hydrodynamics to a nuclear reaction network of similar to 4500 isotopes to study the nucleosynthesis and neutrino emission during the explosion. An electron antineutrino burst with a peak luminosity of similar to 3 x 10(50) erg s(-1) is emitted while the ejecta is heated to similar to 10(9) K. A robust r-process nucleosynthesis is realized in the ejecta. Lanthanides and heavy elements near the second and third r-process peaks are synthesized as end products of nucleosynthesis, suggesting that subminimal neutron star explosions could be an important source of solar chemical elements.
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页数：12
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