Observational and Laboratory Studies of the Evolution of Circumstellar Material

星周物质演化的观测和实验室研究

基本信息

  • 批准号:
    2307305
  • 负责人:
  • 金额:
    $ 39.6万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2023
  • 资助国家:
    美国
  • 起止时间:
    2023-09-01 至 2026-08-31
  • 项目状态:
    未结题

项目摘要

Mass loss from circumstellar envelopes in the late stages of stellar evolution is a major avenue by which the interstellar medium (ISM) becomes enriched in gas, dust, and heavy elements. This research project will investigate the gas phase molecular content of stellar ejecta, from asymptotic giant branch (AGB) stars to protoplanetary nebule (PPNe) and planetary nebulae (PNe). The investigators will extend their ongoing program of radio astronomical observations and laboratory measurements to characterize the molecular inventory and physical properties of these objects. Results from the project will allow astronomers to understand the nature of stellar ejecta and their influence on the diffuse ISM. The project will train graduate and undergraduate students in advanced techniques of radio astronomy and laboratory astrophysics.This research program seeks to elucidate how molecular material evolves from the AGB phase, through the intermediate PPNe phase, to the advanced PNe phase. To accomplish this, the investigators will undertake: (1) a better assessment of the carbon budget and isotope ratios through an extensive analysis of a highly sensitive broadband millimeter-wave survey of the carbon-rich envelope of the AGB star IRC+10216; (2) laboratory measurements of the rotational spectra of new metal-bearing carbides in the radio band to aid their identification in circumstellar envelopes; (3) an analysis of high spatial resolution images of the oxygen-rich envelope of VY Canis Majoris in a variety of molecules to understand the influence of the C/O ratio; and (4) evaluation of the molecular and isotopic composition of a diverse sample of carbon-rich and oxygen-rich PPNe and PNe by radio astronomical observations. A better understanding of the nature of the stellar ejecta, particularly PNe, would also advance our understanding of how they enrich the diffuse ISM.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.
在恒星演化的后期,来自星周包层的质量损失是星际介质(ISM)变得富含气体、尘埃和重元素的主要途径。这项研究项目将研究从渐近巨星分支(AGB)恒星到原行星状星云(PPNe)和行星状星云(PNE)的恒星喷出物的气相分子含量。研究人员将扩展他们正在进行的射电天文观测和实验室测量计划,以表征这些天体的分子清单和物理性质。该项目的结果将使天文学家了解恒星喷发的性质及其对扩散的ISM的影响。该项目将对研究生和本科生进行射电天文学和实验室天体物理学高级技术方面的培训。这项研究计划旨在阐明分子材料如何从AGB阶段,通过PPNe中级阶段,进化到高级PNE阶段。为此,研究人员将进行:(1)通过对AGB恒星IRC+10216富碳包层的高灵敏度宽带毫米波测量的广泛分析,更好地评估碳收支和同位素比率;(2)实验室测量射电频带中新的含金属碳化物的转动光谱,以帮助在星周包层中识别它们;(3)分析VY Canis Majoris在各种分子中富氧包层的高空间分辨率图像,以了解C/O比的影响;以及(4)通过射电天文观测评估各种富碳和富氧的PPNe和PNE的分子和同位素组成。更好地了解恒星喷发的性质,特别是PNE,也将促进我们对它们如何丰富弥漫的ISM的理解。这一奖项反映了NSF的法定使命,并通过使用基金会的智力优势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

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Lucy Ziurys其他文献

Lucy Ziurys的其他文献

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{{ truncateString('Lucy Ziurys', 18)}}的其他基金

Advancing Our Knowledge of the Transition Metal-Carbon Bond: Integrating Spectroscopy and Theory
增进我们对过渡金属-碳键的了解:光谱学和理论的结合
  • 批准号:
    2154121
  • 财政年份:
    2022
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Standard Grant
Following the Molecular History of Stellar Ejecta: Combining Observations with Laboratory Spectroscopy and Imaging
追踪恒星喷射物的分子历史:将观测与实验室光谱和成像相结合
  • 批准号:
    1907910
  • 财政年份:
    2019
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Standard Grant
Probing the Metal-Carbon Bond: High Resolution Spectroscopy of Grignard Reagents and 3d Metal Carbon Clusters
探测金属-碳键:格氏试剂和 3d 金属碳簇的高分辨率光谱
  • 批准号:
    1565765
  • 财政年份:
    2016
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Continuing Grant
Following the Chemical History of Stellar Ejecta through Molecular Observations and Laboratory Spectroscopy
通过分子观测和实验室光谱学追踪恒星喷射物的化学历史
  • 批准号:
    1515568
  • 财政年份:
    2015
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Standard Grant
MRI: Development of a State-of-the-Art Multiband Receiver for Arizona Radio Observatory's New ALMA Antenna
MRI:为亚利桑那射电天文台的新型 ALMA 天线开发最先进的多频段接收器
  • 批准号:
    1531366
  • 财政年份:
    2015
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Standard Grant
Investigating the Chemistry of Circumstellar Material through Millimeter-wave Observations and Laboratory Spectroscopy
通过毫米波观测和实验室光谱研究星周材料的化学
  • 批准号:
    1211502
  • 财政年份:
    2012
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Continuing Grant
The Arizona Radio Observatory: Surveying the ISM through Millimeter and Sub-millimeter Spectroscopy
亚利桑那射电天文台:通过毫米波和亚毫米波谱仪调查 ISM
  • 批准号:
    1140030
  • 财政年份:
    2012
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Continuing Grant
High-Resolution Spectroscopy of 3d Metal-Containing Compounds: Insights into Bond Activation, Catalysis, and Synthesis
3d 含金属化合物的高分辨率光谱:深入了解键活化、催化和合成
  • 批准号:
    1057924
  • 财政年份:
    2011
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Continuing Grant
A Sideband-Separating Receiver at 385-500 GHz: Advancing Spectroscopic Frontiers at Sub-Millimeter Wavelengths
385-500 GHz 的边带分离接收器:推进亚毫米波长的光谱前沿
  • 批准号:
    0905288
  • 财政年份:
    2009
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Standard Grant
Following Refractory Elements from Circumstellar Ejecta to the Interstellar Medium: A Combined Laboratory and Observational Study
追踪从星周喷射物到星际介质的难熔元素:实验室和观测相结合的研究
  • 批准号:
    0906534
  • 财政年份:
    2009
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Standard Grant

相似海外基金

CAREER: Quantifying the Formation and Persistence of Brown Carbon Compounds Through Observational and Laboratory Studies
职业:通过观察和实验室研究量化棕碳化合物的形成和持久性
  • 批准号:
    1555003
  • 财政年份:
    2016
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    $ 39.6万
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Integrated laboratory and electro-optical observational meteor studies
综合实验室和光电观测流星研究
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    4992-2008
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    2012
  • 资助金额:
    $ 39.6万
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    Discovery Grants Program - Individual
Integrated laboratory and electro-optical observational meteor studies
综合实验室和光电观测流星研究
  • 批准号:
    4992-2008
  • 财政年份:
    2011
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Discovery Grants Program - Individual
Integrated laboratory and electro-optical observational meteor studies
综合实验室和光电观测流星研究
  • 批准号:
    4992-2008
  • 财政年份:
    2010
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Discovery Grants Program - Individual
Integrated laboratory and electro-optical observational meteor studies
综合实验室和光电观测流星研究
  • 批准号:
    4992-2008
  • 财政年份:
    2009
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    $ 39.6万
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    Discovery Grants Program - Individual
Integrated laboratory and electro-optical observational meteor studies
综合实验室和光电观测流星研究
  • 批准号:
    4992-2008
  • 财政年份:
    2008
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Discovery Grants Program - Individual
Laboratory and Observational Studies of Refractory Molecules and Ions: Tracing the Metallic Elements from AGB Stars into the ISM
难熔分子和离子的实验室和观测研究:追踪 AGB 恒星中的金属元素到 ISM
  • 批准号:
    0607803
  • 财政年份:
    2006
  • 资助金额:
    $ 39.6万
  • 项目类别:
    Standard Grant
Laboratory and Observational Studies of Interstellar Refractory Molecules: From Chemistry to Nucleosynthesis
星际难熔分子的实验室和观测研究:从化学到核合成
  • 批准号:
    9796154
  • 财政年份:
    1997
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    $ 39.6万
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Laboratory and Observational Studies of Interstellar Refractory Molecules: From Chemistry to Nucleosynthesis
星际难熔分子的实验室和观测研究:从化学到核合成
  • 批准号:
    9503274
  • 财政年份:
    1995
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Experimental, observational and theoretical studies on laboratory astrophysics, astronomy, aeronomy, atmospheric science and remote sensing
实验室天体物理学、天文学、航空学、大气科学和遥感的实验、观测和理论研究
  • 批准号:
    125-1991
  • 财政年份:
    1992
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    $ 39.6万
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