YNAO OpenIR  > 双星与变星研究组
Alternative TitleA Brief Overview and Research Progress of Dwarf Novae
Source Publication天文学进展(Progress In Astronomy)
Contribution Rank第1完成单位
Indexed ByCSCD ; 核心
Keyword双星 激变变星 矮新星 爆发 高低态


Other Abstract

Dwarf novae are erupting cataclysmic variable stars in which a Roche-lobe filling dwarf star (Secondary star) transfers matter to an accretion disc around a white dwarf (Primary star). The gas stream from the secondary star feeds material into the disc at a point near its outer rim where a bright spot is formed. The existence of accretion disc induces complex physical changes and observed features, including the frequent outburst phenomenon and the transitions from high states to low states, etc. The eclipse between binary stars provides an excellent opportunity to determine the relative brightness of each light source, geometric position and physical structure. Compared to most close binary systems, the largest characteristic of dwarf novae are the existence of accretion disc and the frequent outburst phenomenon. First, we give a brief review of the research history and status of dwarf novae studies. Second, the famous phenomenon of the orbital period vacancy and the cut-off of the shortest orbital period are reviewed, where their explanations and challenges on the standard model are presented in general. Then, the orbital period variability is demonstrated to have important role on the research of its evolution, as well as on searching brown dwarf and exoplanet. In addition, the analysis method of the eclipsing light curve and altering between the high and low state are briefly discussed. Finally, we give a brief summary on the development trend and the currently hot issues on the sub ject of dwarf novae.

Funding Project国家自然科学基金[11133007] ; 国家自然科学基金[11325315]
Funding Organization国家自然科学基金[11133007, 11325315]
Subject Area天文学 ; 恒星与银河系 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
Archive Date2015-05-08
Citation statistics
Document Type期刊论文
Corresponding Author韩忠涛
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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
韩忠涛. 矮新星概述与研究进展[J]. 天文学进展(Progress In Astronomy),2014,32(4):441-461.
APA 韩忠涛.(2014).矮新星概述与研究进展.天文学进展(Progress In Astronomy),32(4),441-461.
MLA 韩忠涛."矮新星概述与研究进展".天文学进展(Progress In Astronomy) 32.4(2014):441-461.
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