Islands no more: the important mergers of nearby galaxies and their effects

岛屿不再：附近星系的重要合并及其影响

• 批准号: 2007065
• 负责人: Eric Bell
• 金额: $ 45.4万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2007065&HistoricalAwards=false
• 关键词: Islands; no; more; important; mergers

Galaxy shapes can change dramatically as galaxies interact and collide with each other. In these collisions, the smaller of the two galaxies is torn to pieces and is spread into a faint ‘stellar halo’ that surrounds the larger of the two galaxies. The larger of the two galaxies survives but can be scarred by the collision. The largest collisions can cause new stars to form and can destroy galaxy disks. This research group at the University of Michigan will combine new observations with computer modeling of the past collisions experienced by nearby, well-studied galaxies. This insight will improve our understanding of galaxy growth, and these methods will be used by other astronomers using huge new datasets from the Vera C. Rubin Observatory. The investigators will measure the positive effects of adding research experiences to large introductory college science courses. If scaled-up to other institutions, this approach has the potential to enhance interest in science and science literacy.During this project, the investigators will use Hyper Suprime-Cam on the Subaru optical telescope in Hawaii. They will construct deep and wide-area maps of the stellar halos and satellite systems of a diverse sample of five galaxies with masses similar to the Milky Way mass. They plan to use these new data and models of galaxy growth to develop new metrics of the collisions experienced by a galaxy. With knowledge of these collisions in hand, they can better understand the long-term effects of these collisions on these five specific galaxies. Importantly, they seek to confirm, or refute, tentative correlations between past collisions and satellite galaxy numbers. These properties may signal important missing ingredients in small-scale cosmology and galaxy formation.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.

随着星系相互作用并相互碰撞，星系形状会发生巨大变化。在这些碰撞中，两个星系中的较小的星系被撕成碎片，并散布成一个微弱的“恒星光环”，围绕着两个星系中的较大的星系。两个星系中的较大人物存活，但碰撞可能会伤痕累累。最大的碰撞会导致新恒星形成并可能破坏星系磁盘。密歇根大学的该研究小组将结合新的观察结果与近乎研究的星系经历的过去碰撞的计算机建模。这种见解将提高我们对星系生长的理解，这些方法将使用Vera C. Rubin天文台的大量新数据集使用其他天文学家。研究人员将衡量将研究经验添加到大型介绍大学科学课程中的积极影响。如果扩大到其他机构，这种方法有可能增强对科学和科学素养的兴趣。在此项目中，研究人员将在夏威夷的Subaru光学望远镜上使用超级智能。他们将构建恒星光环和卫星系统的深层和广阔的地图，这些潜水员样品的五个星系样品具有类似于银河系的质量的质量。他们计划使用这些新数据和星系增长模型来开发银河系经历的碰撞的新指标。借助这些碰撞，他们可以更好地理解这些碰撞对这五个特定星系的长期影响。重要的是，他们寻求确认过去的碰撞与卫星星系数量之间的暂定相关性。这些属性可能表明小型宇宙学和星系形成中的重要缺失含量。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响评估标准，被视为通过评估来获得珍贵的支持。

项目成果

The Saga of M81: Global View of a Massive Stellar Halo in Formation

• DOI: 10.3847/1538-4357/abc485
• 发表时间: 2019-10
• 期刊: The Astrophysical Journal
• 作者: A. Smercina;E. Bell;P. Price;C. Slater;R. D’Souza;J. Bailin;R. D. de Jong;I. Jang;A. Monachesi;D. Nidever

Constraining the assembly time of the stellar haloes of nearby Milky Way-mass galaxies through AGB populations

通过 AGB 种群限制邻近银河系质量星系的恒星晕的组装时间

• DOI: 10.1093/mnras/stad2480
• 发表时间: 2023
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Harmsen, Benjamin;Bell, Eric F.;D’Souza, Richard;Monachesi, Antonela;de Jong, Roelof S.;Smercina, Adam;Jang, In Sung;Holwerda, Benne W.
• 通讯作者: Holwerda, Benne W.

Uncertainties associated with the backward integration of dwarf satellites using simple parametric potentials

使用简单参数势对矮卫星进行后向积分相关的不确定性

• DOI: 10.1093/mnras/stac404
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: D’Souza, Richard;Bell, Eric F.
• 通讯作者: Bell, Eric F.

DESI Observations of the Andromeda Galaxy: Revealing the Immigration History of Our Nearest Neighbor

• DOI: 10.3847/1538-4357/aca5f8
• 发表时间: 2022-08
• 期刊: The Astrophysical Journal
• 作者: A. Dey;J. Najita;Sergey E. Koposov;J. Josephy-Zack;Gabriel Maxemin;E. Bell;C. Poppett;E. Patel;L. Silva;A. Raichoor;D. Schlegel;D. Lang;A. Meisner;A. Myers;J. Aguilar;S. Ahlen;C. Prieto;D. Brooks;A. Cooper;K. Dawson;A. Macorra;P. Doel;A. Font-Ribera;J. García-Bellido;S. Gontcho;J. Guy;K. Honscheid;R. Kehoe;T. Kisner;A. Kremin;M. Landriau;L. Guillou;M. Levi;T. Li;P. Martini;R. Miquel;J. Moustakas;J. Nie;N. Palanque-Delabrouille;F. Prada;E. Schlafly;R. Sharples;G. Tarlé;Y. Ting;L. Tyas;M. Valluri;R. Wechsler;H. Zou

The infall of dwarf satellite galaxies are influenced by their host’s massive accretions

矮卫星星系的塌陷受到其宿主的巨大吸积的影响

• DOI: 10.1093/mnras/stab1283
• 发表时间: 2021
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: D’Souza, Richard;Bell, Eric F
• 通讯作者: Bell, Eric F