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arXiv 1102.4660astro-ph.HE
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强磁场存在下中子星向夸克星转化的可能性

Possibility of conversion of neutron star to quark star in presence of high magnetic field

Ritam Mallick, Monika Sinha

摘要:

最近的研究结果和数据表明,中子星(NS)中的强磁场强烈地影响着恒星的特征(半径、质量)。它们甚至被划分为一类称为磁星,其表面磁场大于$10^{14}$ G。本文讨论了这种高磁场对NS到夸克星(QS)的相变的影响。我们研究了磁场对NS到QS转变的影响,包括状态方程中的磁场效应。磁场的加入增加了重子数密度的范围,对于重子数密度的范围,物质在相应相中的流速是有限的。磁场有助于转化过程的启动。然而,由于磁场的存在,转换前沿的速度降低,因为磁场的存在降低了有效压力(P)。恒星的磁场通过转换过程而减小,并且合成的QS具有比初始NS更低的磁场。

英文摘要:

Recent results and data suggests that high magnetic field in neutron stars (NS) strongly affects the characteristic (radius, mass) of the star. They are even separated as a class known as magnetars, for whom the surface magnetic field are greater than $10^{14}$ G. In this work we discuss the effect of such high magnetic field on the phase transition of NS to quark star (QS). We study the effect of magnetic field on the transition from NS to QS including the magnetic field effect in equation of state (EoS). The inclusion of the magnetic field increases the range of baryon number density, for which the flow velocities of the matter in the respective phase are finite. The magnetic field helps in initiation of the conversion process. The velocity of the conversion front however decreases due to the presence of magnetic field, as the presence of magnetic field reduces the effective pressure (P). The magnetic field of the star gets decreased by the conversion process, and the resultant QS has lower magnetic field than that of the initial NS.

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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