Feeding and Feedback: Understanding the Assembly of Galactic Disks

馈送和反馈：了解银河盘的组装

• 批准号: 1817125
• 负责人: Crystal Martin
• 金额: $ 50.56万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-08-31 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1817125&HistoricalAwards=false
• 关键词: Feeding; Feedback; Understanding; Assembly; Galactic

The growth of galaxies occurs as the galaxies gather gas from their surroundings to produce stars. The stars will then produce a 'wind' that is driven by starlight and energetic particles along with supernovae from the explosion of more massive stars. This wind serves to drive gas away from the galaxies which slows down the star formation rate. This project will study the flow of gas in and out of star forming galaxies by looking at how the light from distant quasars is absorbed as it passes through the gas surrounding the more nearby star forming galaxies. The project will also compare their results with cosmological simulations to better understand both the simulations and the status of the galaxies. The project will also enhance the educational opportunities for underrepresented minorities from elementary school to the graduate level.As galaxies grow, they accrete gas from their surroundings to feed their star formation. As they form stars, they produce a galactic wind that drives gas away. This project will study the flow of gas in and out of star forming galaxies. The flow of the gas will be measured by observing absorption lines from circum-galactic gas lying along the line-of-sight to distant quasars. This will give us a better understanding of how gas flows in and out of galaxies as they grow. The project will analyze 50 new sightlines, sampling the circum-galactic medium (CGM) around several typical star forming galaxies. The project will then compare these results with cosmological simulations of galaxy formation, using the EAGLE simulations. The project will also perform a ?Look Back Study? by comparing galaxies at redshifts of ~0.2 with their lower mass progenitors a redshifts of 2. In this part, the project will look at clumpy distant galaxies and statistically determine if the clumpiness can be related to different outflows of gas. The project will also enhance the educational opportunities for underrepresented minorities from elementary school to the graduate level.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.

当星系从其周围聚集气体以产生恒星时，星系就会成长。然后，恒星将产生一种由星光和高能粒子以及更大质量恒星爆炸产生的超新星驱动的“风”。这种风起到了驱离星系气体的作用，从而减缓了恒星的形成速度。这个项目将通过观察来自遥远类星体的光穿过较近的恒星形成星系周围的气体时如何被吸收来研究气体流入和流出恒星形成星系的情况。该项目还将把他们的结果与宇宙学模拟进行比较，以更好地理解模拟和星系的状态。该项目还将增加从小学到研究生的少数族裔的教育机会。随着星系的增长，它们从周围吸收气体来滋养它们的恒星形成。当它们形成恒星时，它们会产生一种星系风来驱散气体。这个项目将研究气体流入和流出恒星形成星系的情况。气体流量将通过观察从视线沿线的银河系周围气体到遥远的类星体的吸收线来测量。这将使我们更好地了解气体在星系生长过程中是如何进出的。该项目将分析50条新的视线，对几个典型的恒星形成星系周围的环星系介质(CGM)进行采样。然后，该项目将使用Eagle模拟将这些结果与星系形成的宇宙学模拟进行比较。该项目还将进行一项？回顾研究？通过比较红移为0.2的星系和其质量较低的前身星系红移为2。在这一部分，该项目将观察远处的块状星系，并从统计上确定这种块状是否与不同的气体流出有关。该项目还将增加从小学到研究生的少数族裔的教育机会。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

How Gas Accretion Feeds Galactic Disks

• DOI: 10.3847/1538-4357/ab0ec2
• 发表时间: 2019-03
• 期刊: The Astrophysical Journal
• 作者: S. Ho;C. Martin;M. Turner

Resolving 3D Disk Orientation Using High-resolution Images: New Constraints on Circumgalactic Gas Inflows

使用高分辨率图像解析 3D 圆盘方向：环银河系气体流入的新限制

• DOI: 10.3847/1538-4357/ab58cd
• 发表时间: 2020
• 期刊: The Astrophysical Journal
• 作者: Ho, Stephanie H.;Martin, Crystal L.
• 通讯作者: Martin, Crystal L.

How Identifying Circumgalactic Gas by Line-of-sight Velocity instead of the Location in 3D Space Affects O vi Measurements

通过视线速度而不是 3D 空间中的位置来识别绕银河系气体如何影响 O vi 测量

• DOI: 10.3847/1538-4357/ac2c73
• 发表时间: 2021
• 期刊: The Astrophysical Journal
• 作者: Ho, Stephanie H.;Martin, Crystal L.;Schaye, Joop
• 通讯作者: Schaye, Joop

The Mass–Metallicity Relation at z ∼ 1–2 and Its Dependence on the Star Formation Rate

• DOI: 10.3847/1538-4357/ac1105
• 发表时间: 2021-07
• 期刊: The Astrophysical Journal
• 作者: A. Henry;M. Rafelski;B. Sunnquist;N. Pirzkal;C. Pacifici;H. Atek;M. Bagley;I. Baronchelli;G. Barro;A. Bunker;J. Colbert;Y. Dai;B. Elmegreen;D. Elmegreen;S. Finkelstein;D. Kocevski;A. Koekemoer;M. Malkan;C. Martin;V. Mehta;A. Pahl;C. Papovich;M. Rutkowski;J. Sánchez Almeida;C. Scarlata;G. Snyder;H. Teplitz

Exploring the dust content of galactic haloes with Herschel III. NGC 891

与赫歇尔三号一起探索银河晕的尘埃含量。

• DOI: 10.1093/mnras/staa3583
• 发表时间: 2021
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Yoon, J H;Martin, Crystal L;Veilleux, S;Meléndez, M;Mueller, T;Gordon, K D;Cecil, G;Bland-Hawthorn, J;Engelbracht, C
• 通讯作者: Engelbracht, C