Rotation and Oxygen Abundances of Blue Horizontal Branch Stars
Rotation and Oxygen Abundances of Blue Horizontal Branch Stars
批准号:
9315136
负责人:
Ruth Peterson
金额:
$12.63万
依托单位:
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1994
资助国家:
美国
项目状态:
已结题
起止时间:
1994-05-01 至 1997-12-31
中文摘要
小行星9315136 在不同的球状星团中,恒星以完全不同的方式沿着水平分支分布。 虽然红巨星分支上的质量损失被广泛认为是造成这种分布的原因,但控制质量损失的基本参数还没有确定。 PI将测量具有一系列性质的星团中水平分支恒星的旋转速度、氧丰度和氦丰度。 这将有助于确定这些参数中是否有任何一个在水平分支演化中起重要作用。 ***
英文摘要
9315136 Peterson In various globular clusters, stars are distributed along the horizontal branch in quite different ways. Although mass loss on the red giant branch is widely thought to be responsible for this distribution, the underlying parameter which controls the mass loss has not been established. The PI will measure rotation velocities, oxygen abundances and helium abundances for horizontal branch stars in clusters with a range of properties. This will help to establish whether any of these parameters play an important role in horizontal branch evolution. ***
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依托单位:
Mixing, Metallicity, and Binaries on the Blue Horizontal Branch
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批准号:0098725
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资助金额:$0.0万
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依托单位:
Rotation and Oxygen Abundances of Horizontal Branch Stars
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依托单位:
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批准号:9115183
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资助金额:$7.6万
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财政年份:1992
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依托单位:
Spectral Analyses of Old Stellar Populations (Stars and Stellar Evolution): VPW
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批准号:9103302
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依托单位:
Spectrocopic Studies of Stars in Metal-Poor Systems
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依托单位:
Spectroscopic Analyses of Metal-Poor Stars in Globular Clusters
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依托单位:
Characteristics of Nucleosynthesis and Stellar Populations Discerned From Abundance Analyses of Metal-Poor Stars
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批准号:7925880
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项目类别:Standard Grant
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资助金额:$12.49万
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财政年份:1980
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Abundance Determinations For Thirty Extremely Metal-Poor Stars
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批准号:7618890
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依托单位:
海外基金