Optically Thick Wind Theory and its application to Binary Evolution Associate Prof.

光厚风理论及其在二元进化中的应用副教授

• 批准号: 09640325
• 负责人: KATO Mariko
• 金额: $ 1.54万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640325/
• 关键词: stellar mass-loss; white dwarfs; binary system; nova; supernova

The main results of this research is summarized as follows :1. Light curve analysis of novaeI established light curve analysis of classical nova using optically thick wind theory. This is a new method to determine the white dwarf mass of binaries.2. Progenitor of Type Ia SupernovaeThe optically thick wind governs the binary evolution, because the wind carries away the angular momentum and the mass from the system. We include this effects of the wind into the binary evolution and found two new ways to type Ia supernova progenitor : Super-soft X-ray channel and the Symbiotic channel.3. Relation between Recurrent Novae and Type Ia SupernovaDetailed light curve analysis of nine recurrent novae, we find that most of the recurrent nova is in the stage just before the type Ia supernova explosion.4. Structure of Very Massive Main-SequenceVery massive stars have a core-halo structure even in the main-sequence stage due to the iron peak in the opacity. The photospheric temperature decreases as the stellar mass increases, which is consistent with observational properties.

本研究的主要成果概括如下：1.新星的光变曲线分析我用光学厚风理论建立了经典新星的光变曲线分析。这是确定双星白色矮星质量的一种新方法. Ia型超新星的前身光学厚风控制着双星的演化，因为风带走了系统的角动量和质量。我们将这种风的影响纳入双星演化中，发现了Ia型超新星祖先的两种新途径：超软X射线通道和共生通道.复发新星与Ia型超新星的关系通过对9颗复发新星的光变曲线的详细分析，我们发现大多数复发新星都处于Ia型超新星爆发前的阶段.超大质量主序星的结构由于不透明度中的铁峰，即使在主序星阶段，超大质量恒星也具有核晕结构。光球温度随着恒星质量的增加而降低，这与观测性质一致。

项目成果

Kato: "Evolution of Novae, He Novae and the Final He shell flashes"Advances in Stellar Evolution, Cambridge U.Press. 198-205 (1997)

加藤：“新星、He 新星的演化和最后的 He 壳闪烁”《恒星演化进展》，剑桥大学出版社。

M.Kato: "Optically Thick Wind from Degenerate Dwarfs, I."CLASSICAL NOVA OF POPULATIONS I AND II.1997, ApJS.. 113. 121-129

M.Kato：“来自退化矮星的光学厚风，I.”人口的经典新星 I 和 II.1997，ApJS.. 113. 121-129

Hachisu, I.& Kato, M.: "A Theoretical Light-Curve for the 1985 Outburst of RS Ophiuchi"ApJL. 536. L93 (2000)

八须，I.

Hachisu & Kato: "A Theoretical Light-Curve For the 1985 Outburst of RS Ophiuchi"Astrophys.J.Letters. 536. L93-L96 (2000)

八须

Kobayashi 他: "Metallicity Dependent Type Ia Supernowa Rate and Galactic and Cosmic Chemical Evolution" Astrophys.J.Letters. 503. 155-159 (1998)

Kobayashi 等人：“金属度相关的 Ia 型超新率和银河和宇宙化学演化”Astrophys.J.Letters 503. 155-159 (1998)