Comparative Spectroscopic Study of Stars in Nearby Dwarf Galaxies and in the Halo of Our Galaxy

附近矮星系和银河系光环中恒星的比较光谱研究

• 批准号: 15540236
• 负责人: SADAKANE Kozo
• 金额: $ 1.98万
• 依托单位: Osaka Kyoiku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15540236/
• 关键词: Dwarf galaxies; Galactic chemical evolution; High resolution spectroscopy; Stellar chemical compositions; 化学進化; 惑星を持つ星; 化学特異星; 化学組成解析

High resolution spectroscopic observations of red giant stars belonging to several nearby dwarf galaxies were carried out using the high dispersion spectrograph (HDS) of the SUBARU telescope. Abundance analyses of these red giants were performed using several well studied metal deficient halo stars in our Gaxaly as references. Several interesting abundance patterns, which are different from those found in Galactic halo stars, were discovered in a few red giant stars belonging to the UMa dwarf galaxy. These findings can be used in modeling the evolution history of dwarf galaxies. Observations of red giant stars in the Sextans dwarf galaxy have completed in January, 2007. Analyses of these stars will be completed within a few years.

使用斯巴鲁望远镜的高色散摄谱仪（HDS）对属于附近几个矮星系的红巨星进行了高分辨率光谱观测。这些红巨星的丰度分析是使用我们银河系中几颗经过充分研究的金属缺乏晕恒星作为参考进行的。在属于乌玛矮星系的一些红巨星中发现了几种有趣的丰度模式，这些模式与银晕恒星中发现的丰度模式不同。这些发现可用于模拟矮星系的演化历史。对六分仪矮星系中红巨星的观测已于 2007 年 1 月完成。对这些恒星的分析将在几年内完成。

项目成果

Chemical Composition of the Magnetic B Star HR 5049

磁性 B Star HR 5049 的化学成分

• 发表时间: 2004
• 期刊: Astron.Astrophys. 420
• 作者: M.Nishimura;K.Sadakane;et al.
• 通讯作者: et al.

X Bootis-Like Abundances in the Vega-Like, y Doradus Type-Pulsator HD 218396

X 类织女星中的类 Bootis 丰度，y Doradus 型脉动器 HD 218396

• 发表时间: 2006
• 期刊: Publications of the Astronomical Society of Japan 58
• 作者: Y.Kayaba et al.;E.Shintani et al.;S.Aoki;S.Aoki;K.Sadakane;S.Aoki;A.Helmi et al.;S.Aoki;G.Bottaglia et al.;S.Aoki;K.Sadakane et al.;S.Aoki;K.Sadakane
• 通讯作者: K.Sadakane

Forty Years of Stellar Spectroscopic Astrophysics in Japan

日本恒星光谱天体物理学四十年

• 发表时间: 2005
• 期刊: P.A.S.Japan 57
• 作者: K.Sadakane;R.Hirata;T.Tsuji
• 通讯作者: T.Tsuji

Sulfur Abundances in Metal-Poor Stars Based on OAO-1.88m/HIDES Spectra

基于 OAO-1.88m/HIDES 光谱的贫金属恒星中的硫丰度

• 发表时间: 2005
• 期刊: PASJ 57
• 作者: Takada-Hidai;M. et al.
• 通讯作者: M. et al.

λ Bootis-Like Abundances in the Vega-Like, Y Doradus Type-Pulsator HD 218396

类 Vega、Y Doradus 型脉动器 HD 218396 中的 λ Bootis 类丰度

• 发表时间: 2006
• 期刊: Publications of the Astronomical Society of Japan 58
• 作者: Y.Kayaba et al.;E.Shintani et al.;S.Aoki;S.Aoki;K.Sadakane
• 通讯作者: K.Sadakane