发表机构
Indian Institute of Science Education and Research Bhopal; Tata Institute of Fundamental Research; Center for Theoretical Physics（印度科学教育研究所博帕尔分校; 塔塔基础研究所; 理论物理中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究通过计算中子星低质量X射线双星的长期演化，解释了为何瞬变源多于持续源，并揭示了轨道周期与相态的关系，为改进吸积盘不稳定性模型提供了新途径。
AI 中文摘要
中子星低质量X射线双星（LMXB）是一种中子星从低质量伴星吸积物质的系统，是探测物理学和天文学某些基本方面的理想源，如强引力、超致密物质以及吸积-喷流过程。然而，要可靠地实现这些目标，必须充分理解中子星LMXB，包括为何有些系统持续吸积而另一些则间歇性吸积。基于吸积盘热-黏滞不稳定性的聚焦模型被认为可以解释间歇性吸积。然而，更广泛的视角，包括哪些LMXB参数值和相态导致瞬变，以及为何瞬变源多于持续源，仍知之甚少。在此，我们计算了中子星LMXB的长期演化，解决了这些问题，提供了对LMXB参数和相态的洞察，自然产生了比持续源更多的瞬变源，并与观测源的部分已知性质一致。例如，从LMXB演化计算中，我们通常发现在较低轨道周期处持续相态占比更大，这与观测大致相符。然而，缺乏完全一致性要求改进上述聚焦模型，而我们的计算为区分这些模型提供了一种新途径。
英文摘要
A neutron star (NS) low-mass X-ray binary (LMXB), in which an NS accretes matter from a low-mass donor star, is an ideal source for probing some fundamental aspects of physics and astronomy, such as strong gravity, superdense matter, and the accretion-ejection processes. However, to reliably achieve these goals, one must adequately understand NS LMXBs, including why some accrete persistently and others transiently. Focused models, such as those based on a thermal-viscous instability in the accretion disk, are considered to explain transient accretion. However, broader perspectives, including which LMXB parameter values and phases cause transients and why there are more transients than persistents, remain poorly understood. Here, our computation of the long-term evolution of NS LMXBs addresses these questions, providing insight into LMXB parameters and phases, naturally producing more transients than persistents, and being partially consistent with the known properties of observed sources. For example, we typically find a greater fraction of persistent phase at lower orbital periods from the LMXB evolution computation, which is somewhat consistent with observations. However, a lack of full consistency calls for improving the aforementioned focused models, and our computations provide a new way to discriminate among these models.
Comments11 pages, 2 figures, 2 tables, accepted for publication in ApJ
