论文标题
MIT袋型号的扩展中的夸克芯
Quark cores in extensions of the MIT Bag model
论文作者
论文摘要
最近对具有两个太阳能质量质量的巨大脉冲星的观察结果对紧凑型物体（例如混合恒星和中子星）构成了新的挑战。袋子模型和Nambu-Jona-Lasino模型的扩展已被用于对这些恒星进行建模以获得更高的质量恒星。这些巨大恒星的岩心已经预测了夸克物质。在这项工作中，我们表明，具有化学势依赖性袋参数的袋模型的扩展可以导致中子恒星核心的等质相变。我们的模型表明，具有所有三个夸克$ u $，$ d $和$ s $的EO将导致具有稳定夸克物质的大型恒星。我们发现，恒星的质量不仅取决于袋子的常数，而且还取决于奇怪的夸克的质量。决定表面上的红移值的质量半径比表明可以获得稳定的自界奇怪的夸克物质恒星，具有合理的袋压力值，这与最近对大质量恒星的观察结果相对应。
Recent observations of massive pulsars having masses of the order of two solar mass pose a new challenge for compact objects such as hybrid stars and neutron stars. Extensions of the bag model and the Nambu-Jona-Lasino model have been used to model these stars to get higher mass stars. Quark matter has been predicted in the cores of these massive stars. In this work we show that an extension of the bag model, with a chemical potential dependent bag parameter can lead to an isentropic phase transition in the core of the neutron star. Our model shows that an EoS having all three quarks $u$, $d$ and $s$ would lead to massive stars with stable quark matter. We find that the mass of the stars not only depends on the bag constant but also on the mass of the strange quark. The mass - radius ratio which determines the redshift values on the surface, indicates that it is possible to obtain stable self bound strange quark matter stars with reasonable values of the bag pressure which correspond to the recent observations of large mass stars.
