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I型X射线暴多峰结构的研究进展
Alternative TitleThe Research Progress of Multi-Peaked Type-I X-ray Bursts
李臣1,2,3; 张国宝1,2,3; 王建成1,2,3; 陈玉鹏4; 吕铭5
Source Publication天文学进展 (Progress In Astronomy)
2021-03
Volume39Issue:1Pages:29-48
DOI10.3969/j.issn.1000-8349.2021.01.02
ClassificationP142.6
Contribution Rank第1完成单位
Indexed ByCSCD ; 核心
Keyword小质量X射线双星 吸积中子星 X射线暴 I型X射线暴
Abstract

I型X射线暴(热核暴)是发生在小质量X射线中子星双星系统中X射线波段流量突然大幅度增加的一种高能现象。在热核闪模型下,此现象被认为主要由中子星表面热核不稳定燃烧主要引起的。典型X射线暴的光变曲线呈现快速上升(1~5 s)、幂指数下降(10~100 s)的单峰结构。随着X射线暴样本的增加,在观测上出现了一类多峰结构的热核暴。在现有的115个暴源中,至少6个暴源有此类多峰结构暴。通过研究多峰暴的观测性质,发现多峰暴只出现在极少数不同类型不同吸积状态的暴源中,其中大部分多峰暴的峰值流量小于爱丁顿极限,除少数多峰暴呈三峰结构以外,大部分多峰暴是双峰结构,并且双峰暴的两峰值相对强弱没有固定规律,暴频振荡在多峰暴当中的出现也无明显规律性。针对这些观测现象,总结了关于多峰暴的多个理论解释。

Other Abstract

Type-I (thermonuclear) X-ray bursts show a phenomenon of sudden increase in X-ray intensity, usually occurring in Low-Mass X-ray Binaries (LMXBs). Type-I Xray bursts are considered as unstable ignition of accreted fuel on the surface of an accreting neutron star in the thermonuclear flash model. In a typical X-ray burst, the light curve shows a single-peaked profile with a fast rise and an exponential decay (FRED). With increasing detections of X-ray bursts, some unusual multi-peaked bursts appear. To date, the number of burster increases to 115, but only six sources have been reported with multi-peaked bursts. We find that multi-peaked bursts only appear in a few sources at different accretion rate. The peak flux in most of the multi-peaked bursts is lower than Eddington flux. Except the very rare triple-peaked bursts, most of the multi-peaked bursts are double-peaked bursts, and there is no regularity between the peaks’intensity in each double-peaked burst. The burst oscillation phenomenon has also no obvious regularity in double-peaked X-ray bursts. Finally, we summarize the theoretical models of multi-peaked bursts.

Funding Project国家自然科学基金[U1838116] ; 国家自然科学基金[Y7CZ181002] ; 国家自然科学基金[U1838201] ; 国家自然科学基金[U1938101]
Funding Organization国家自然科学基金[U1838116, Y7CZ181002, U1838201, U1938101]
Language中文
Subject Area天文学 ; 天体物理学 ; 高能天体物理学
MOST Discipline Catalogue理学 ; 理学::天文学
ISSN1000-8349
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/24198
Collection高能天体物理研究组
中国科学院天体结构与演化重点实验室
Corresponding Author张国宝
Affiliation1.中国科学院云南天文台, 昆明, 650011
2.中国科学院大学, 北京, 100049
3.中国科学院天体结构与演化重点实验室, 昆明, 650011
4.中国科学院高能物理研究所, 北京, 100049
5.湘潭大学物理学院, 湘潭, 411105
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
李臣,张国宝,王建成,等. I型X射线暴多峰结构的研究进展[J]. 天文学进展 (Progress In Astronomy),2021,39(1):29-48.
APA 李臣,张国宝,王建成,陈玉鹏,&吕铭.(2021).I型X射线暴多峰结构的研究进展.天文学进展 (Progress In Astronomy),39(1),29-48.
MLA 李臣,et al."I型X射线暴多峰结构的研究进展".天文学进展 (Progress In Astronomy) 39.1(2021):29-48.
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