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arXiv 2407.08124gr-qcastro-ph.HE
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中子星自发标量化中的动力学转变:大质量标量场情形

Dynamical transition to spontaneous scalarization in neutron stars: The massive scalar field scenario

Juan Carlos Degollado, Néstor Ortiz, Marcelo Salgado

AI总结:

本文在标量-张量引力理论中数值研究中子星自发标量化的动力学转变,发现大质量标量场可抑制其作用范围,从而帮助恒星准静态构型规避双星系统对标量化程度的观测约束,并分析了标量场质量对恒星总质量的影响。

摘要:

我们在标量-张量引力理论框架下,数值分析了中子星向自发标量化的动力学转变,其中标量场是自由但有质量的,并在Jordan框架中与引力非最小耦合。我们表明,恒星在转变后所达到的准静态构型可以避免由双星系统中的若干观测对标量化程度施加的观测约束,这是因为质量项的存在抑制了标量场的作用范围。我们还研究了标量场质量相对于无质量情形对恒星总质量的影响。

英文摘要:

We analyze numerically the dynamical transition to spontaneous scalarization in neutron stars in the framework of a scalar-tensor theory of gravity where the scalar field is free but massive, and it is coupled nonminimally to gravity in the Jordan frame. We show that the quasistatic configuration of the star that settles after the transition can avoid the observational constraints imposed on the amount of scalarization by several observations in binary systems due to the presence of the mass term, which suppresses the range of the scalar field. We also study the impact of the scalar field mass on the total mass of the star relative to the massless scenario.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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