Understanding subdwarf B stars through asteroseismology

通过星震学了解亚矮星 B 星

基本信息

  • 批准号:
    0307480
  • 负责人:
  • 金额:
    $ 29.15万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2003
  • 资助国家:
    美国
  • 起止时间:
    2003-08-01 至 2008-07-31
  • 项目状态:
    已结题

项目摘要

AST 0307480PI ReedAfter decades of progress in both stellar evolution theory and observational stellar astronomy, the late stages of evolution of most of the stars in our Galaxy - stages in which they shed their outer envelopes and expose their compact cores - conceal many still-unanswered questions. Recently, we have begun to exploit a powerful tool, astroseismology, for probing the interiors of stars and modeling their structure from oscillations and pulsations of the stars. Subdwarf B (sdB) stars are evolved stars located on the so-called horizontal branch of the Hertzsrung-Russell diagram, and they are thought to be the precursors of low mass white dwarf stars. Their progenitors are stars like our Sun. To date, the observational emphasis has been on discovering new pulsating sdB stars. With over 30 members discovered, the field is now mature enough to turn the success we have enjoyed applying astroseismology of white dwarfs to sdB stars. To do so requires that sufficient photometric data be obtained to resolve the often complex pulsation structure of individual objects. As horizontal branch stars, sdB stars are burning helium in their cores, With their limited hydrogen envelopes, these stars have no shell hydrogen burning simplifying their structure, and making them easier to model. Thus far only a few pulsating sdB stars have resolved pulsation spectra, some of which have revealed very interesting results. The goal of this research is to fully apply the tools of astroseismology to sdB stars by resolving the pulsation spectra of several additional members. This requires substantial telescope time to be split between national facilities, Baker Observatory (operated by our home institution), and multi-site observational campaigns with international collaborators. Pulsating stars may also be used to look for planets. Companions to sdB stars can be detected as periodic variations in the pulsation phases. Such measurements are readily sensitive to sub-Jupiter mass planets with long periods. Broader impacts. Undergraduate students will assist in obtaining and reducing the data in this research project. By exposing undergraduate students to research, they are better able to decide if astronomy is the correct career path for them. Additionally, it allows Southwest Missouri State's students to competitively apply for graduate programs based on a strong undergraduate research experience.
AST0307480PI Reed在恒星演化理论和观测恒星天文学方面取得了几十年的进展后,我们银河系中大多数恒星演化的后期阶段--它们脱下外层包层,暴露出致密的核心--掩盖了许多仍然悬而未决的问题。最近,我们已经开始开发一种强大的工具,天体地震学,用于探测恒星的内部,并根据恒星的振荡和脉动来模拟它们的结构。亚矮星B(SDB)是位于Hertzsrung-Russell图水平分支上的演化恒星,它们被认为是低质量白矮星的前身。它们的祖先是像我们的太阳一样的恒星。到目前为止,观测的重点一直是发现新的脉动SDB恒星。随着30多个成员的发现,这个领域现在已经足够成熟,可以将我们将白矮星的天体地震学应用于SDB恒星的成功转化为我们所享有的成功。要做到这一点,需要获得足够的光度学数据,以解析单个物体往往复杂的脉动结构。作为水平分支恒星,SDB恒星在其核心中燃烧氦,由于其有限的氢包层,这些恒星没有壳层氢燃烧,简化了它们的结构,使它们更容易建模。到目前为止,只有几颗脉动的SDB恒星解析了脉动光谱,其中一些已经揭示了非常有趣的结果。这项研究的目标是通过解析几个额外成员的脉动谱,将天体地震学的工具充分应用于SDB星。这需要大量的望远镜时间分配给国家设施、贝克天文台(由我们的本土机构运营)和与国际合作者的多地点观测活动。脉动恒星也可以用来寻找行星。SDB恒星的伴星可以被检测到脉动相的周期性变化。这样的测量对长周期的亚木星质量行星很敏感。更广泛的影响。本科生将帮助获取和减少本研究项目中的数据。通过让本科生从事研究,他们能够更好地决定天文学对他们来说是否是正确的职业道路。此外,它还允许西南密苏里州立大学的学生基于强大的本科生研究经验竞争性地申请研究生课程。

项目成果

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Michael Reed其他文献

Persistent Fetal Gene Expression Patterns During Assist Device Support
辅助设备支持期间持续的胎儿基因表达模式
  • DOI:
  • 发表时间:
    2009
  • 期刊:
  • 影响因子:
    0
  • 作者:
    B. Lowes;R. Zolty;S. Shakar;A. Brieke;Norman;Gray;Michael Reed;M. Calalb;W. Minobe;J. Lindenfeld;E. Wolfel;M. Geraci;M. Bristow;J. Cleveland
  • 通讯作者:
    J. Cleveland
A Novel Intervention to Reduce Bronchoscopy Laboratory Costs
  • DOI:
    10.1378/chest.1993730
  • 发表时间:
    2014-10-01
  • 期刊:
  • 影响因子:
  • 作者:
    Kevin Kane;Christopher Gilbert;Jennifer Toth;Michael Reed
  • 通讯作者:
    Michael Reed
Rationale for the Implementation of Low-Volume, High-Intensity Exercise in School Physical Education
学校体育实施小量高强度运动的理由
  • DOI:
  • 发表时间:
    2017
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Michael Reed;Kay Daigle
  • 通讯作者:
    Kay Daigle
Endobronchial Valves as Destination Therapy for Secondary Spontaneous Pneumothorax in a Man With Acute Myelogenous Leukemia
  • DOI:
    10.1378/chest.1701367
  • 发表时间:
    2013-10-01
  • 期刊:
  • 影响因子:
  • 作者:
    Umar Osman;Jennifer Toth;Christopher Gilbert;Michael Reed
  • 通讯作者:
    Michael Reed
A Case of Pulmonary Alveolar Microlithiasis Presenting as Crazy Paving
  • DOI:
    10.1378/chest.1989412
  • 发表时间:
    2014-10-01
  • 期刊:
  • 影响因子:
  • 作者:
    Umar Osman;Jennifer Toth;Christopher Gilbert;Michael Reed
  • 通讯作者:
    Michael Reed

Michael Reed的其他文献

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{{ truncateString('Michael Reed', 18)}}的其他基金

Proposal Writing Workshop for Psychology Education Research and Development
心理学教育研究与发展提案写作研讨会
  • 批准号:
    2228188
  • 财政年份:
    2022
  • 资助金额:
    $ 29.15万
  • 项目类别:
    Standard Grant
RUI: Asteroseismology of subdwarf B stars as representatives of high-temperature physics and horizontal branch stellar cores.
RUI:作为高温物理和水平分支恒星核心代表的亚矮B星的星震学。
  • 批准号:
    1312869
  • 财政年份:
    2013
  • 资助金额:
    $ 29.15万
  • 项目类别:
    Continuing Grant
RUI: Asteroseismology of pulsating Subdwarf B stars via observational mode identification and modeling
RUI:通过观测模式识别和建模研究脉动亚矮星 B 星的星震学
  • 批准号:
    1009436
  • 财政年份:
    2010
  • 资助金额:
    $ 29.15万
  • 项目类别:
    Continuing Grant
EMSW21-RTG: Enhanced Training and Recruitment in Mathematical Biology
EMSW21-RTG:数学生物学加强培训和招聘
  • 批准号:
    0943760
  • 财政年份:
    2010
  • 资助金额:
    $ 29.15万
  • 项目类别:
    Continuing Grant
RUI: The Baker Observatory Sub-minute Survey: Exploring the galaxy at high temporal resolution.
RUI:贝克天文台亚分钟巡天:以高时间分辨率探索星系。
  • 批准号:
    0913175
  • 财政年份:
    2009
  • 资助金额:
    $ 29.15万
  • 项目类别:
    Standard Grant
Analysis of Mechanisms of Biochemical Homeostasis
生化稳态机制分析
  • 批准号:
    0616710
  • 财政年份:
    2006
  • 资助金额:
    $ 29.15万
  • 项目类别:
    Standard Grant
NER/SNB: Electronic Devices from Viral and Cytoskeletal Templates
NER/SNB:来自病毒和细胞骨架模板的电子设备
  • 批准号:
    0508338
  • 财政年份:
    2005
  • 资助金额:
    $ 29.15万
  • 项目类别:
    Standard Grant
NIRT: Science and Technology of Nanoporous Metal Films
NIRT:纳米多孔金属薄膜科学与技术
  • 批准号:
    0507023
  • 财政年份:
    2005
  • 资助金额:
    $ 29.15万
  • 项目类别:
    Standard Grant
Hyperacuity in the Auditory System
听觉系统的超敏锐度
  • 批准号:
    0109872
  • 财政年份:
    2001
  • 资助金额:
    $ 29.15万
  • 项目类别:
    Continuing Grant
Mathematical Investigation of Neural Processing in the Auditory Brainstem
听觉脑干神经处理的数学研究
  • 批准号:
    9805761
  • 财政年份:
    1998
  • 资助金额:
    $ 29.15万
  • 项目类别:
    Standard Grant

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Observations and Analysis of Binaries Containing Hot Subdwarf Stars
含有热亚矮星的双星的观测和分析
  • 批准号:
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    2021
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MUCHFUSS-Finding the most and least massive companions to hot subdwarf stars
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RUI: Asteroseismology of subdwarf B stars as representatives of high-temperature physics and horizontal branch stellar cores.
RUI:作为高温物理和水平分支恒星核心代表的亚矮B星的星震学。
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RUI: Asteroseismology of pulsating Subdwarf B stars via observational mode identification and modeling
RUI:通过观测模式识别和建模研究脉动亚矮星 B 星的星震学
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