Collaborative Research: Kinematics and Chemistry of M33 - Determining the Past, Present and Future of the M31/M33 System

合作研究：M33 的运动学和化学 - 确定 M31/M33 系统的过去、现在和未来

• 批准号: 1909759
• 负责人: Puragra Guha Thakurta
• 金额: $ 37.91万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1909759&HistoricalAwards=false
• 关键词: Collaborative; Research; Kinematics; Chemistry; M33

This project will use the Keck telescope to study individual stars in M33, a companion galaxy to the Andromeda galaxy (M31). Using spectroscopy, they will obtain information about the motion and star formation history of the disk and potential halo of M33. They will use this information to learn if its interactions with M31 have influenced its evolution. The science program is integrated with a high school research program that will introduce students to cutting-edge research on M33's formation history.With a mass ten times lower than M31's and a star formation rate 10 times higher, M33 is the best local analog for high z galaxies. Spectroscopic observations of resolved stars in M31 will provide measurements of the line-of-sight stellar velocities and dispersion and quantitative comparisons of the dynamics of the stellar and gas disk components. It will also produce the first iron and alpha-element abundance distributions for stars in M33. Finally, it will definitively determine of M33 has a stellar halo. This chemo-dynamical analysis will provide critical observational constraints on internal and external heating mechanisms affecting low-mass stellar disks. It will also constrain models of M33's orbit around M31, yielding insights into whether M33 is on first infall or has interacted substantially with M31 in the past.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.

该项目将使用凯克望远镜研究仙女座星系 (M31) 的伴星系 M33 中的单个恒星。利用光谱学，他们将获得有关圆盘运动和恒星形成历史以及 M33 潜在晕的信息。他们将利用这些信息来了解它与 M31 的相互作用是否影响了它的进化。该科学项目与高中研究项目相结合，向学生介绍 M33 形成历史的前沿研究。M33 的质量比 M31 低十倍，恒星形成率高 10 倍，是最好的本地类似物。 z 星系。对 M31 中分辨恒星的光谱观测将提供视线恒星速度和色散的测量，以及恒星和气盘成分动力学的定量比较。它还将产生 M33 中恒星的第一个铁和 α 元素丰度分布。最终，它将最终确定M33具有恒星光环。这种化学动力学分析将为影响低质量恒星盘的内部和外部加热机制提供关键的观测约束。它还将约束 M33 围绕 M31 的轨道模型，从而深入了解 M33 是否首次坠落或过去与 M31 发生过实质性相互作用。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值进行评估，被认为值得支持以及更广泛的影响审查标准。

项目成果

The Triangulum Extended (TREX) Survey: The Stellar Disk Dynamics of M33 as a Function of Stellar Age

• DOI: 10.3847/1538-3881/ac5324
• 发表时间: 2022-02
• 期刊: The Astronomical Journal
• 作者: A. Quirk;P. Guhathakurta;K. Gilbert;L. Chemin;J. Dalcanton;B. Williams;A. Seth;E. Patel;Justin T. Fung;Pujita Tangirala;Ibrahim Yusufali

The TREX Survey: Kinematical Complexity Throughout M33's Stellar Disk and Evidence for a Stellar Halo*

TREX 巡天：M33 恒星盘的运动学复杂性和恒星光环的证据*

• DOI: 10.3847/1538-4357/ac3480
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Gilbert, Karoline M.;Quirk, Amanda C. N.;Guhathakurta, Puragra;Tollerud, Erik;Wojno, Jennifer;Dalcanton, Julianne J.;Durbin, Meredith J.;Seth, Anil;Williams, Benjamin F.;Fung, Justin T.
• 通讯作者: Fung, Justin T.

Resolved Dwarf Galaxy Searches within ∼5 Mpc with the Vera Rubin Observatory and Subaru Hyper Suprime-Cam*

使用 Vera Rubin 天文台和 Subaru Hyper Suprime-Cam* 解决了 â⁄5 Mpc 内的矮星系搜索问题*

• DOI: 10.3847/1538-4357/ac0db8
• 发表时间: 2021
• 期刊: The Astrophysical Journal
• 作者: Mutlu-Pakdil, Burçin;Sand, David J.;Crnojević, Denija;Drlica-Wagner, Alex;Caldwell, Nelson;Guhathakurta, Puragra;Seth, Anil C.;Simon, Joshua D.;Strader, Jay;Toloba, Elisa
• 通讯作者: Toloba, Elisa