arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.08292gr-qchep-th
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密度增加的玻色子和中子星

Boson and neutron stars with increased density

Y. Brihaye, L. Ducobu, B. Hartmann

摘要:

本文在标量-张量引力模型中讨论了玻色子星和中子星,模型中的实标量场明显随时间变化。虽然在我们的模型中的玻色子星-在对比中子星-不拥有一个坚硬的核心,我们发现,标量头发的形成的定性效果是相似的,在这两种情况下:引力标量的存在允许两种类型的恒星存在更大的中心密度以及更大的质量在给定的半径比他们的广义相对论同行。特别是,我们发现了具有标量头发的新型中子星,其半径非常接近相应的史瓦西半径,因此在密度上与黑洞相当。这个新的分支的解决方案是稳定的衰变到个别重子。

英文摘要:

We discuss boson stars and neutron stars, respectively, in a scalar-tensor gravity model with an explicitly time-dependent real scalar field. While the boson stars in our model -- in contrast to the neutron stars -- do not possess a hard core, we find that the qualitative effects of the formation of scalar hair are similar in both cases : the presence of the gravity scalar allows both type of stars to exist for larger central density as well as larger mass at given radius than their General Relativity counterparts. In particular, we find new types of neutron stars with scalar hair which have radii very close to the corresponding Schwarzschild radius and hence are comparable in density to black holes. This new branch of solutions is stable with respect to the decay into individual baryons.

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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