Quark matter with strong magnetic field and possibility of the third family of compact stars
Quark matter with strong magnetic field and possibility of the third family of compact stars
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DOI：
10.1093/mnras/stx219
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发表时间：
2017-01
影响因子：
4.8
通讯作者：
H. Sotani;T. Tatsumi
中科院分区：
文献类型：
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作者：
H. Sotani;T. Tatsumi
我们认为存在的可能性的第三家庭的紧凑的对象，考虑到强磁场的影响内的混合恒星。结果，我们证明了这种新的序列的稳定平衡位形的一些强子状态方程。通过对恒星内部绝热指数的分析，找到了第三类致密天体出现的条件，对于没有夸克的强子星，最大质量应该小，最大质量的中心密度也应该小，最大质量的半径应该大。即使对于软强子状态方程，这两颗太阳质量的恒星也可能作为第三类致密天体存在，一旦考虑到具有强磁场的夸克物质，例如$\sim {\cal O}（10^{19} {\rm G}）$。这可能会给解决核物理中所谓的超子之谜提供一个线索。
We consider the possibility for the existence of the third family of compact objects, considering the effect of strong magnetic fields inside the hybrid stars. As a result, we demonstrate such new sequences of stable equilibrium configurations for some hadronic equations of state. Through the analysis of the adiabatic index inside stars, we find the conditions for appearing the third family of compact objects, i.e., for hadronic stars without quarks, that the maximum mass should be small, the central density for the maximum mass should be also small, and the radius for the the maximum mass should be large. Even for soft hadronic equations of state, the two solar-mass stars might survive as the third family of compact objects, once quark matter with strong magnetic field, such as $\sim {\cal O}(10^{19} {\rm G})$, is taken into account. It might give a hint to solve the so-called hyperon puzzle in nuclear physics.