论文标题
旋转诱导的夸克 - 戴隆相过渡
Spin-down induced quark-hadron phase transition in cold isolated neutron stars
论文作者
论文摘要
在这项工作中，我们研究了在冷的，孤立的中子星中旋转诱导的相变。出生后，随着恒星的速度，其中央密度升高并越过相变的临界密度，并在恒星内播种夸克芯。中级质量恒星在出生时的一生中更有可能在夸克播种。较小的中子恒星没有夸克核心，并且一生都保持中子星，而在巨大的恒星中，夸克核心从出生开始就存在。在中级和巨大的恒星中，随着恒星的减速，夸克核的增长进一步增长。夸克核心的出现导致恒星进化史的恒星惯性时刻突然变化，并且它也反映在恒星的制动指数中突然不连续（以夸克核心第一种子的频率）。随着夸克芯的接种，在相变过程中释放的能量可以激发恒星中的F模式振荡，并以重力波的形式发射，该引力波在当前的操作检测器的检测范围内；但是，未来的探测器将使该信号更加干净。同样，中微子和伽马射线的爆发可能源自相转换事件。旋转诱导的相变可能是逐渐的，也可以以随后产生持续或多个瞬态排放的形式。
We have studied the spin-down induced phase transition in cold, isolated neutron stars in this work. After birth, as the star slows down, its central density rises and crosses the critical density of phase transition, and a quark core is seeded inside the star. Intermediate mass stars are more likely to have a quark seeding in their lifetime at birth. Smaller neutron stars do not have a quark core and remain neutron stars throughout their life, whereas in massive stars, a quark core exists at their center from birth. In intermediate and massive stars, the quark core grows further as the star slows down. The appearance of a quark core leads to a sudden change in the moment of inertia of the star in its evolutionary history, and it is also reflected in a sudden discontinuity in the braking index of the star (at the frequency where the quark core first seeds). The energy released during the phase transition process as the quark core is seeded can excite the f-mode oscillation in the star and is emitted in the form of the gravitational wave, which is in the range of detection with present operating detectors; however, future detectors will enable a more clean extraction of this signals. Also, neutrinos and bursts of gamma-rays can originate from phase transition events. The spin-down induced phase transition could be gradual or in the form of subsequent leaps producing persistent or multiple transient emissions.
