Time resolved spectroscopy of luminous sdOs - searching for their massive compact companions
发光 sdO 的时间分辨光谱 - 寻找它们的巨大致密伴星
基本信息
- 批准号:229821280
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2012
- 资助国家:德国
- 起止时间:2011-12-31 至 2012-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Luminous hot subdwarf stars of spectral type O are the remnants of main sequence stars that lost most of their hydrogen envelopes. The formation of these stars is unclear. Recently, two of the brighest sdOs have been discovered to be X-ray binaries with massive compact companion like white dwarfs or neutron stars. Although this kind of sdO stars is known for decades, no systematic search for close companions has been conducted. We were granted seven nights at McDonald observatory to take high resolution, time resolved spectroscopy of 8 bright sdOs with the SES spectrograph mounted at the 2.1m telescope. Our goal is to measure radial velocity shifts caused by unseen, close companions and derive the orbital solutions of such binaries. The nature of the unseen companions can be constrained in this way.
光谱类型为O的发光热亚矮星是失去大部分氢包层的主序星的残余。这些恒星的形成尚不清楚。最近,两个最明亮的sdO被发现是X射线双星,它们有着像白色矮星或中子星这样的大质量致密伴星。虽然这种sdO恒星已经被发现了几十年,但还没有系统地寻找过它的近伴星。我们被授予七个晚上在麦克唐纳天文台采取高分辨率,时间分辨光谱的8个明亮的sdO与SES摄谱仪安装在2.1米望远镜。我们的目标是测量径向速度变化所造成的看不见的,密切的同伴,并得出这样的双星的轨道解决方案。看不见的同伴的性质可以通过这种方式受到限制。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Professor Dr. Stephan Geier其他文献
Professor Dr. Stephan Geier的其他文献
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{{ truncateString('Professor Dr. Stephan Geier', 18)}}的其他基金
Searching for long period pulsations in He-rich subdwarfs (Southern hemisphere)
寻找富 He 亚矮星(南半球)的长周期脉动
- 批准号:
406052633 - 财政年份:2018
- 资助金额:
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Research Grants
Searching for long period pulsations in He-rich subdwarfs
寻找富 He 亚矮星中的长周期脉动
- 批准号:
404880276 - 财政年份:2018
- 资助金额:
-- - 项目类别:
Research Grants
The population of close binary hot subdwarfs studied with light curves from space telescopes
用太空望远镜的光变曲线研究了紧密双星热亚矮星的种群
- 批准号:
400079267 - 财政年份:2018
- 资助金额:
-- - 项目类别:
Research Grants
Studying the hot subdwarf population with Gaia
用盖亚研究热亚矮星种群
- 批准号:
325816898 - 财政年份:2017
- 资助金额:
-- - 项目类别:
Research Grants
Late stages of stellar evolution in the Gaia era
盖亚时代恒星演化的晚期阶段
- 批准号:
299438592 - 财政年份:2016
- 资助金额:
-- - 项目类别:
Heisenberg Fellowships
Fundamental parameters of hot subdwarf stars from the Tycho-Gaia sample
第谷-盖亚样本中热亚矮星的基本参数
- 批准号:
329530046 - 财政年份:2016
- 资助金额:
-- - 项目类别:
Research Grants
Hot subdwarf stars with substellar companions from the MUCHFUSS project
来自 MUCHFUSS 项目的热亚矮星及其亚恒星伴星
- 批准号:
224973632 - 财政年份:2012
- 资助金额:
-- - 项目类别:
Research Grants
MUCHFUSS - Follow up und MUCHFUSS - Photometrie follow up
MUCHFUSS - 跟进和 MUCHFUSS - 光度测定跟进
- 批准号:
220618016 - 财政年份:2012
- 资助金额:
-- - 项目类别:
Research Grants
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