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A Census of Mass-Transfer, Merger, and Collision Products in Old Open Clusters

旧疏散星团中质量转移、合并和碰撞产物的普查

基本信息

批准号：
1801937
负责人：
Emily Leiner
金额：
$ 10万
依托单位：
Leiner Emily
依托单位国家：
美国
项目类别：
Fellowship Award
财政年份：
2018
资助国家：
美国
起止时间：
2018-09-01 至 2021-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1801937&HistoricalAwards=false
关键词：
Census Mass Transfer Merger Collision

项目摘要

Emily Leiner is awarded an NSF Astronomy and Astrophysics Postdoctoral Fellowship to conduct a program of research and education at Northwestern University. Nearly half of the stars similar to the Sun exist in binary star systems. Leiner will study hundreds of binary stars within ?open clusters?, or groups of stars similar in age and composition. This study will yield an extensive and well characterized sample of binary stars that could help advance our understanding of binary stellar evolution. Alongside this research, Leiner will work with local high school students through an outreach program at Northwestern, and she will conduct public outreach at the Adler Planetarium.Leiner will perform a census of post-interaction binary stars on the main sequence and giant branches of five open clusters ranging in age from 2.5 to 8 billion years. She will identify these stars using rotation rates derived from light curves and extensive radial velocity catalogs. In addition, she will identify exceedingly massive stars from their oscillation frequencies and determine their masses and radii using asteroseismic techniques. Leiner will use this new census to constrain formation rates and lifetimes for these post-interaction populations, as well as to investigate the physics that sets these rates and lifetimes. Leiner will also engage Chicago-area high school students to produce 3D-printed models of oscillating red giant stars and interacting binary systems, and she will use these models to enhance the learning experience of visitors to the Adler Planetarium.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

艾米莉·莱纳 (Emily Leiner) 获得美国国家科学基金会天文学和天体物理学博士后奖学金，在西北大学开展研究和教育项目。近一半与太阳相似的恒星存在于双星系统中。莱纳将研究“疏散星团”内的数百颗双星，或年龄和成分相似的恒星群。这项研究将产生广泛且特征明确的双星样本，有助于增进我们对双星演化的理解。除了这项研究之外，莱纳还将通过西北大学的一项外展计划与当地高中生合作，她还将在阿德勒天文馆进行公众外展活动。莱纳将对年龄从 2.5 到 80 亿年不等的五个疏散星团的主序带和巨型分支进行相互作用后双星普查。她将使用从光变曲线和广泛的径向速度目录得出的旋转速率来识别这些恒星。此外，她还将根据振荡频率识别超大质量恒星，并使用星震技术确定它们的质量和半径。莱纳将利用这次新的人口普查来限制这些相互作用后种群的形成率和寿命，并研究设定这些速率和寿命的物理原理。莱纳还将邀请芝加哥地区的高中生制作振荡红巨星和相互作用的双星系统的 3D 打印模型，她将利用这些模型来增强阿德勒天文馆游客的学习体验。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Observations of Spin-down in Post-mass-transfer Stars and the Possibility for Blue Straggler Gyrochronology

DOI：
10.3847/2041-8213/aaf4ed
发表时间：
2018-12-20
期刊：
ASTROPHYSICAL JOURNAL LETTERS
影响因子：
7.9
作者：
Leiner, Emily;Mathieu, Robert D.;Sills, Alison
通讯作者：
Sills, Alison

Constraining Mass-transfer Histories of Blue Straggler Stars with COS Spectroscopy of White Dwarf Companions

DOI：
10.3847/1538-4357/ab4273
发表时间：
2019-04
期刊：
The Astrophysical Journal
影响因子：
0
作者：
N. Gosnell;E. Leiner;R. Mathieu;A. Geller;C. Knigge;A. Sills;N. Leigh
通讯作者：
N. Gosnell;E. Leiner;R. Mathieu;A. Geller;C. Knigge;A. Sills;N. Leigh

Revealing the Field Sub-subgiant Population Using a Catalog of Active Giant Stars and Gaia EDR3

使用活跃巨星目录和盖亚 EDR3 揭示场次亚巨星种群

DOI：
10.3847/1538-4357/ac53b1
发表时间：
2022
期刊：
The Astrophysical Journal
影响因子：
0
作者：
Leiner, Emily M.;Geller, Aaron M.;Gully-Santiago, Michael A.;Gosnell, Natalie M.;Tofflemire, Benjamin M.
通讯作者：
Tofflemire, Benjamin M.

A Census of Blue Stragglers in Gaia DR2 Open Clusters as a Test of Population Synthesis and Mass Transfer Physics