arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1701.08463astro-ph.HEnucl-th
收藏

奇异星Strangeon Star

Strangeon and Strangeon Star

Xiaoyu Lai, Renxin Xu

摘要:

脉冲星的性质本质上是低能基本强相互作用(量子色动力学解释)的中心问题,尽管人们付出了巨大的努力,但其解决仍然是一个挑战。如果强相互作用物质的真正基态可能是大块的奇异夸克物质而不是Fe ^[56](即所谓的威滕猜想),那么这种致密天体实际上可能是奇异夸克星。然而,从天体物理学的观点来看,奇怪的星团物质可能是绝对稳定的,因此这些致密星实际上可能是奇怪的星团星。这个提议可以被看作是一个普遍的威滕猜想:奇异物质可以是绝对稳定的,其中夸克要么是自由的(对于奇异夸克物质),要么是定域的(对于奇异团簇物质)。具有三光味对称性的奇异星系团被重新命名为奇异子,为了简单起见,它被合并为“奇异核子”。奇异子星可以被认为是一个三味的巨大核,奇异子是它的组成部分,就像核子是正常(微)核的组成部分一样。奇异子星的观测结果表明,在奇异子星的体制中可以理解脉冲星样致密星的不同表现,我们期待着通过先进的设备(例如,FAST、SKA和eXTP)。

英文摘要:

The nature of pulsar-like compact stars is essentially a central question of the fundamental strong interaction (explained in quantum chromo-dynamics) at low energy scale, the solution of which still remains a challenge though tremendous efforts have been tried. This kind of compact objects could actually be strange quark stars if strange quark matter in bulk may constitute the true ground state of the strong-interaction matter rather than Fe^56 (the so-called Witten's conjecture). From astrophysical points of view, however, it is proposed that strange cluster matter could be absolutely stable and thus those compact stars could be strange cluster stars in fact. This proposal could be regarded as a general Witten's conjecture: strange matter in bulk could be absolutely stable, in which quarks are either free (for strange quark matter) or localized (for strange cluster matter). Strange cluster with three-light-flavor symmetry is renamed strangeon, being coined by combining "strange nucleon" for the sake of simplicity. A strangeon star can then be thought as a 3-flavored gigantic nucleus, and strangeons are its constituent as an analogy of nucleons which are the constituent of a normal (micro) nucleus. The observational consequences of strangeon stars show that different manifestations of pulsar-like compact stars could be understood in the regime of strangeon stars, and we are expecting more evidence for strangeon star by advanced facilities (e.g., FAST, SKA, and eXTP).

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。

↑