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.

引用

页数：12

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