A Holistic View of Gas, Dust, and Metals in Galaxies
星系中气体、尘埃和金属的整体视图
基本信息
- 批准号:2108081
- 负责人:
- 金额:$ 35.08万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2021
- 资助国家:美国
- 起止时间:2021-09-01 至 2024-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The gas between stars is part of the interstellar medium (ISM) and is fundamental to understanding how galaxies evolve. However, the gas often can only be studied by indirect methods, and the most widely used tracer is emission from carbon monoxide (CO). This project will advance the understanding of CO and dust as tracers, using new observations of nearby galaxies from the Hubble Space Telescope, the Atacama Large Millimeter/submillimeter Array, and other facilities. The team will study the CO emission from the ISM of the Magellanic Clouds, as well as the ISM in the centers of nearby galaxies. They will conduct a series of summer workshops designed to help transfer students moving from community colleges to UC San Diego. Transfer students are a diverse, highly motivated group, disadvantaged by the compressed timeline after transferring, and removing these barriers is a key step in broadening the participation of under-represented groups. Indirect methods are needed because most of the hydrogen molecules are too cold to produce emission lines. Calibrating CO emission as a tracer requires understanding several parameters: the dust-to-gas ratio as a function of metallicity, the relation between dust emission and dust mass at a given temperature, and the conversion between CO and hydrogen, all of which vary with conditions in the ISM. The new observations will be brought together to create an applicable prescription for dust emissivity, dust-to-gas ratio, and conversion factor, as a function of environment. This will allow assessment of the ISM gas content over the full range from the Milky Way to distant high-redshift galaxies, and help to remove inescapable systematic uncertainties intrinsic to the current approach. The work should yield new insights into the physical state of the ISM in galaxies, including the arrangement of molecular clouds and their response to galactic environment.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.
恒星之间的气体是星际介质(ISM)的一部分,是了解星系如何发展的基础。但是,通常只能通过间接方法对气体进行研究,使用最广泛的示踪剂是一氧化碳(CO)的发射。该项目将使用对哈勃太空望远镜,Atacama大型毫米/亚毫米阵列和其他设施的附近星系的新观测来提高对CO和DUST作为示踪剂的理解。该团队将研究麦哲伦云ISM以及附近星系中心的ISM的CO排放。他们将举办一系列夏季研讨会,旨在帮助将学生从社区大学转移到圣地亚哥分校。转学学生是一个多样化,有积极性的团体,转移后压缩时间表处于不利地位,消除这些障碍是扩大代表性不足群体的参与的关键步骤。需要间接方法是因为大多数氢分子太冷而无法产生排放线。校准CO发射作为示踪剂需要了解几个参数:尘埃气比与金属性的函数,给定温度下的灰尘发射和灰尘质量之间的关系以及CO与氢之间的转换,所有这些都随ISM中的条件而变化。新的观察结果将汇总在一起,以创建适用于尘埃发射率,灰尘与气体比和转化因子的适用处方,作为环境的函数。这将允许评估从银河系到遥远的高红色星系的整个范围内的ISM气体含量,并有助于消除当前方法固有的不可避免的系统不确定性。这项工作应在星系中对ISM的物理状态产生新的见解,包括分子云的布置及其对银河环境的反应。该奖项反映了NSF的法定任务,并被认为是值得通过基金会的知识分子优点和更广泛的影响审查标准来评估的。
项目成果
期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
PHANGS–JWST First Results: A Global and Moderately Resolved View of Mid-infrared and CO Line Emission from Galaxies at the Start of the JWST Era
- DOI:10.3847/2041-8213/acab01
- 发表时间:2022-12
- 期刊:
- 影响因子:0
- 作者:A. Leroy;A. Bolatto;K. Sandstrom;E. Rosolowsky;A. Barnes;F. Bigiel;M. Boquien;J. D. den Brok;Yixian Cao;J. Chastenet;M. Chevance;I. Chiang 江;R. Chown;D. Colombo;S. Ellison;E. Emsellem;K. Grasha;J. Henshaw;A. Hughes;R. Klessen;E. Koch;Jaeyeon Kim;K. Kreckel;J. Kruijssen;K. Larson;Janice C. Lee;R. C. Levy;Lihwai Lin;Daizhong Liu;S. Meidt;J. Pety;M. Querejeta;M. Rubio;T. Saito;S. Salim;E. Schinnerer;M. Sormani;Jiayi Sun;D. Thilker;A. Usero;S. Vogel;E. Watkins;Cory M. Whitcomb;T. Williams;C. Wilson
- 通讯作者:A. Leroy;A. Bolatto;K. Sandstrom;E. Rosolowsky;A. Barnes;F. Bigiel;M. Boquien;J. D. den Brok;Yixian Cao;J. Chastenet;M. Chevance;I. Chiang 江;R. Chown;D. Colombo;S. Ellison;E. Emsellem;K. Grasha;J. Henshaw;A. Hughes;R. Klessen;E. Koch;Jaeyeon Kim;K. Kreckel;J. Kruijssen;K. Larson;Janice C. Lee;R. C. Levy;Lihwai Lin;Daizhong Liu;S. Meidt;J. Pety;M. Querejeta;M. Rubio;T. Saito;S. Salim;E. Schinnerer;M. Sormani;Jiayi Sun;D. Thilker;A. Usero;S. Vogel;E. Watkins;Cory M. Whitcomb;T. Williams;C. Wilson
Fuelling the nuclear ring of NGC 1097
为 NGC 1097 的核环提供燃料
- DOI:10.1093/mnras/stad1554
- 发表时间:2023
- 期刊:
- 影响因子:4.8
- 作者:Sormani, Mattia C.;Barnes, Ashley T.;Sun, Jiayi;Stuber, Sophia K.;Schinnerer, Eva;Emsellem, Eric;Leroy, Adam K.;Glover, Simon C. O.;Henshaw, Jonathan D.;Meidt, Sharon E.
- 通讯作者:Meidt, Sharon E.
The Physical Drivers and Observational Tracers of CO-to-H 2 Conversion Factor Variations in Nearby Barred Galaxy Centers
附近禁止星系中心CO-to-H 2 转换因子变化的物理驱动因素和观测示踪剂
- DOI:10.3847/1538-4357/accb86
- 发表时间:2023
- 期刊:
- 影响因子:0
- 作者:Teng, Yu-Hsuan;Sandstrom, Karin M.;Sun, Jiayi;Gong, Munan;Bolatto, Alberto D.;Chiang, I-Da;Leroy, Adam K.;Usero, Antonio;Glover, Simon C.;Klessen, Ralf S.
- 通讯作者:Klessen, Ralf S.
Wide-field CO isotopologue emission and the CO-to-H 2 factor across the nearby spiral galaxy M101
邻近螺旋星系 M101 的宽场 CO 同位素体发射和 CO-to-H 2 因子
- DOI:10.1051/0004-6361/202245718
- 发表时间:2023
- 期刊:
- 影响因子:6.5
- 作者:den Brok, Jakob S.;Bigiel, Frank;Chastenet, Jérémy;Sandstrom, Karin;Leroy, Adam;Usero, Antonio;Schinnerer, Eva;Rosolowsky, Erik W.;Koch, Eric W.;Chiang, I-Da
- 通讯作者:Chiang, I-Da
A 2–3 mm high-resolution molecular line survey towards the centre of the nearby spiral galaxy NGC 6946
对附近螺旋星系 NGC 6946 中心进行的 2 × 3 毫米高分辨率分子线勘测
- DOI:10.1051/0004-6361/202142624
- 发表时间:2022
- 期刊:
- 影响因子:6.5
- 作者:Eibensteiner, C.;Barnes, A. T.;Bigiel, F.;Schinnerer, E.;Liu, D.;Meier, D. S.;Usero, A.;Leroy, A. K.;Rosolowsky, E.;Puschnig, J.
- 通讯作者:Puschnig, J.
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Karin Sandstrom其他文献
Karin Sandstrom的其他文献
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{{ truncateString('Karin Sandstrom', 18)}}的其他基金
Resolving the Structure of Photodissociation Regions at Low Metallicity
解析低金属丰度下光解离区域的结构
- 批准号:
2308274 - 财政年份:2023
- 资助金额:
$ 35.08万 - 项目类别:
Standard Grant
A New View of the Chemical Evolution of Nearby Galaxies with Keck and VLT Integral Field Spectroscopy
利用 Keck 和 VLT 积分场光谱观察邻近星系化学演化的新视角
- 批准号:
1816462 - 财政年份:2018
- 资助金额:
$ 35.08万 - 项目类别:
Standard Grant
Collaborative Research: Dust, Gas, and Star Formation: Synthesizing 20 Years of Radio, Millimeter, and Infrared Surveys
合作研究:尘埃、气体和恒星形成:综合 20 年的无线电、毫米波和红外勘测
- 批准号:
1615728 - 财政年份:2016
- 资助金额:
$ 35.08万 - 项目类别:
Standard Grant
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An innovative view of Star-forming molecular cloud gas brought by SCUBA-2 plus POL_2
SCUBA-2 加上 POL_2 带来的恒星形成分子云气体的创新视图
- 批准号:
19H01938 - 财政年份:2019
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The Close-up View of Massive Star Clusters and their Gas
大质量星团及其气体的特写视图
- 批准号:
1515570 - 财政年份:2015
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Structure analysis on the gas-liquid interface from the view point of solution chemistry
从溶液化学角度分析气液界面的结构
- 批准号:
17550082 - 财政年份:2005
- 资助金额:
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Grant-in-Aid for Scientific Research (C)
1. The nature of 2MASS "red AGN"; 2. Ionised gas in quasar host galaxies: the integral field view
1. 2MASS“红色活动星系核”的性质;
- 批准号:
5412149 - 财政年份:2003
- 资助金额:
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Research Grants
Development of wide view gamma-ray Imaging Detector
宽视场伽马射线成像探测器的研制
- 批准号:
12354002 - 财政年份:2000
- 资助金额:
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Grant-in-Aid for Scientific Research (A)