大质量夸克恒星中的强相互作用夸克物质

IF 3.6 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Classical and Quantum Gravity Pub Date : 2025-06-16 DOI:10.1088/1361-6382/ade192

Adamu Issifu, Franciele M da Silva, Luis C N Santos, Débora P Menezes and Tobias Frederico

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引用次数: 0

摘要

本文研究了夸克星（QSs）中高重子密度（ρB）强耦合物质的性质。QS模型是在密度依赖夸克质量（DDQM）框架的基础上，通过增强单胶子相互作用产生更高的排斥压力来改进DDQM （MDDQM）。结合脉冲星HESS J1731 347、PSR J0030 0451、PSR J0740 6620和PSR J0952 0607的观测数据，利用贝叶斯推理对模型参数进行了约束。我们的研究结果表明，与DDQM模型相比，MDDQM模型产生的量子质量和紧凑度更高。在所研究的四种MDDQM参数化中，两种产生的最大恒星质量分别为1.86和2.10，并在基础夸克物质（QM）中表现出近共形行为。另外两个参数化，产生的QS质量分别为2.30和2.37，对应于底层QM中更强的相互作用。这些发现为定义量子力学的状态方程及其对量子力学结构和稳定性的影响提供了重要的见解。

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Strongly interacting quark matter in massive quark stars

This paper investigates the properties of strongly coupled matter at high baryon densities (ρB) in quark stars (QSs). The QS model is based on the density-dependent quark mass (DDQM) framework, modified DDQM (MDDQM) by enhancing the single-gluon interaction to generate higher repulsive pressure. The model parameters are constrained using Bayesian inference, incorporating observational data from the pulsars HESS J1731 347, PSR J0030 0451, PSR J0740 6620, and PSR J0952 0607. Our results show that the MDDQM model produces QSs with higher mass and compactness compared to the DDQM model. Among the four MDDQM parameterizations studied, two yield maximum star masses of 1.86 and 2.10 and exhibit near-conformal behavior in the underlying quark matter (QM). The other two parameterizations, yielding QS masses of 2.30 and 2.37 , correspond to a stronger interaction in the underlying QM. These findings provide important insights into the equation of state of deconfined QM and its implications for the structure and stability of QSs.

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来源期刊

Classical and Quantum Gravity 物理-天文与天体物理

CiteScore

7.00

自引率

8.60%

发文量

301

审稿时长

2-4 weeks

期刊介绍： Classical and Quantum Gravity is an established journal for physicists, mathematicians and cosmologists in the fields of gravitation and the theory of spacetime. The journal is now the acknowledged world leader in classical relativity and all areas of quantum gravity.