Implications from GW170817 for Δ-isobar Admixed Hypernuclear Compact Stars

被引：75

作者：

Li, Jia Jie ^{[1
]}

Sedrakian, Armen ^{[2
,3
]}

机构：

[1] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany

[2] Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany

[3] Univ Wroclaw, Inst Theoret Phys, PL-50204 Wroclaw, Poland

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2019年 / 874卷 / 02期

关键词：

equation of state; gravitational waves; stars: neutron; MULTI-MESSENGER OBSERVATIONS; EQUATION-OF-STATE; NEUTRON-STARS; MAXIMUM MASS; HYPERONS; CONSTRAINTS;

D O I：

10.3847/2041-8213/ab1090

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The effects of Delta-isobars on the equation of state of dense matter and structure of compact stars (CSs) are explored within the covariant density functional theory and confronted with the data on tidal deformability (TD) extracted from the GW170817 event. We show that the presence of Delta-isobars substantially softens the tension between the predictions of the hypernuclear density functionals and the inference from the observations of relatively small radius and small TD of canonical-mass CSs. The TDs deduced from GW170817 are compatible with the existence of hypernuclear CSs containing an admixture of Delta-isobars. We thus argue that the GW170817 event is consistent with a merger of a binary CS system having both strangeness (hyperons) and Delta-isobars in the stellar core.

引用

页数：5

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