瞬态吸积作用下快速旋转中子星的自旋平衡

IF 3.2 Q2 ASTRONOMY & ASTROPHYSICS
Galaxies Pub Date : 2023-10-01 DOI:10.3390/galaxies11050103
Sudip Bhattacharyya
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引用次数: 0

摘要

由于恒星磁层与薄的开普勒吸积盘之间的相互作用而产生的自旋平衡的概念,以及相应的平衡自旋频率的著名公式,为理解自旋演化和快速旋转的中子星(即毫秒脉冲星)的分布提供了关键的理解。然而,这个概念和公式是针对稳定吸积的,但大多数吸积毫秒脉冲星的传质是短暂的,在爆发期间吸积速率以数量级变化。在这篇简短而集中的综述中,我们简要地讨论了一个相对较新的自旋平衡条件的概念和瞬态吸积毫秒脉冲星平衡自旋频率的新公式。我们还回顾了一种估算瞬时吸积毫秒脉冲星平衡自旋频率的新方法,即使脉冲星尚未达到自旋平衡。这对于探测毫秒脉冲星的自旋演化和分布至关重要,也应该适用于所有通过薄的开普勒吸积盘瞬态吸积的磁性恒星。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Spin Equilibrium of Rapidly Spinning Neutron Stars via Transient Accretion
The concept of spin equilibrium due to an interaction between the stellar magnetosphere and a thin, Keplerian accretion disk, and a well-known formula of the corresponding equilibrium spin frequency, provide a key understanding of spin evolution and the distribution of rapidly spinning neutron stars, viz., millisecond pulsars. However, this concept and formula are for stable accretion, but the mass transfer to most accreting millisecond pulsars is transient and the accretion rate evolves by orders of magnitude during an outburst. In this short and focussed review, we briefly discuss a relatively new concept of the spin equilibrium condition and a new formula for the equilibrium spin frequency for transiently accreting millisecond pulsars. We also review a new method to estimate this equilibrium spin frequency for observed transiently accreting millisecond pulsars, even when a pulsar has not yet attained the spin equilibrium. These will be crucial to probe the spin evolution and distribution of millisecond pulsars, and should also be applicable to all magnetic stars transiently accreting via a thin, Keplerian accretion disk.
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来源期刊
Galaxies
Galaxies Physics and Astronomy-Astronomy and Astrophysics
CiteScore
4.90
自引率
12.00%
发文量
100
审稿时长
11 weeks
期刊介绍: Es una revista internacional de acceso abierto revisada por pares que proporciona un foro avanzado para estudios relacionados con astronomía, astrofísica y cosmología. Areas temáticas Astronomía Astrofísica Cosmología Astronomía observacional: radio, infrarrojo, óptico, rayos X, neutrino, etc. Ciencia planetaria Equipos y tecnologías de astronomía. Ingeniería Aeroespacial Análisis de datos astronómicos. Astroquímica y Astrobiología. Arqueoastronomía Historia de la astronomía y cosmología. Problemas filosóficos en cosmología.
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