Collaborative Research: The Evolution of Dwarf Galaxies - A Comprehensive View of the Magellanic Clouds

合作研究：矮星系的演化——麦哲伦云的综合视角

• 批准号: 1908331
• 负责人: David Nidever
• 金额: $ 35.13万
• 依托单位: Montana State University
• 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 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1908331&HistoricalAwards=false
• 关键词: Collaborative; Research; Evolution; Dwarf; Galaxies

The investigators lead large imaging and spectroscopic surveys of two nearby dwarf galaxies, the Large and Small Magellanic Clouds. While most dwarf galaxies are challenging to study because they are intrinsically faint, the Magellanic Clouds (MCs) are nearby and serve as a unique laboratory to study the structure and dynamics of low-mass galaxies. The investigators will utilize the power of both the imaging Survey of the MAgellanic Stellar History (SMASH) and high-resolution spectroscopy from the Apache Point Observatory Galactic Evolution Experiment (APOGEE) to substantially improve our knowledge of the MCs.The investigators will create large maps of the element abundance patterns and gradients across both MCs. With this combination of observations, they hope to understand the elemental abundance changes over time and space in the MCs by using nuclear reaction models and drawing comparisons to simulations. In addition, the investigators will engage the public in state-of-the art research through a citizen science project called "The APOGEE Spectral Zoo", which will be developed on the Zooniverse platform. Citizens will visually inspect samples of the two million individual APOGEE spectra - including time series spectra on almost all sources - and classify the APOGEE targets, flagging any that appear to have interesting or "abnormal" spectral features that are not currently recognized in the current automated APOGEE spectral analysis pipeline. These citizen scientists will learn many aspects of astronomy, including stars with emission line spectra, time variable objects, double-line spectroscopic binary stars, chemically peculiar stars and cataclysmic variables. The citizens will enhance the research by producing a complementary classification of stars in the survey. The investigator will check the accuracy of the pipeline analysis by comparison with the citizen scientists classifications.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.

研究人员对附近的两个矮星系，大麦哲伦云和小麦哲伦云进行了大型成像和光谱调查。 虽然大多数矮星系都很难研究，因为它们本身就很微弱，但麦哲伦云（MC）就在附近，是研究低质量星系结构和动力学的独特实验室。 研究人员将利用MAgellanic恒星历史成像调查（SMASH）和Apache Point Observatory Galactic Evolution Experiment（APOGEE）的高分辨率光谱学的力量，大大提高我们对MC的认识。研究人员将创建两个MC的元素丰度模式和梯度的大型地图。 通过这种观测组合，他们希望通过使用核反应模型并与模拟进行比较来了解MC中元素丰度随时间和空间的变化。 此外，研究人员将通过一个名为“APOGEE光谱动物园”的公民科学项目，让公众参与最先进的研究，该项目将在Zooniverse平台上开发。公民将目视检查200万个APOGEE光谱的样本（包括几乎所有来源的时间序列光谱），并对APOGEE目标进行分类，标记任何似乎具有当前未识别的有趣或“异常”光谱特征的目标。当前自动化APOGEE光谱分析管道。这些公民科学家将学习天文学的许多方面，包括具有发射线光谱的恒星、时变天体、双线光谱双星、化学奇特的恒星和灾变变星。市民将通过在调查中对恒星进行补充分类来加强研究。 该奖项反映了NSF的法定使命，并通过使用基金会的知识价值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

Symbiotic Stars in the Apache Point Observatory Galactic Evolution Experiment Survey: The Case of LIN 358 and SMC N73 (LIN 445a)

• DOI: 10.3847/1538-4357/ac09ec
• 发表时间: 2021
• 期刊: The Astrophysical Journal
• 作者: J. Washington;H. Lewis;B. Anguiano;S. Majewski;S. Chojnowski;V. Smith;K. Stassun;C. Allende Prieto-C.-Al

Kinematical Analysis of Substructure in the Southern Periphery of the Large Magellanic Cloud

• DOI: 10.3847/1538-4357/ac5621
• 发表时间: 2022-02
• 期刊: The Astrophysical Journal
• 作者: Xinlun Cheng;Yumi Choi;K. Olsen;D. Nidever;S. Majewski;A. Monachesi;G. Besla;César Muñoz Gonzalez;B. Anguiano;Andr'es Almeida;R. Muñoz;R. Lane;C. Nitschelm

The synchronized dance of the magellanic clouds’ star formation history

麦哲伦星云的同步舞蹈——恒星形成历史

• DOI: 10.1093/mnrasl/slac030
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society: Letters
• 作者: Massana, P;Ruiz-Lara, T;Noël, N E;Gallart, C;Nidever, D L;Choi, Y;Sakowska, J D;Besla, G;Olsen, K A;Monelli, M
• 通讯作者: Monelli, M

The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar, and APOGEE-2 Data

斯隆数字巡天第十七次数据发布：MaNGA、MaStar和APOGEE-2数据完整发布

• DOI: 10.3847/1538-4365/ac4414
• 发表时间: 2022
• 期刊: The Astrophysical Journal Supplement Series
• 作者: Abdurro’uf;Accetta, Katherine;Aerts, Conny;Silva Aguirre, Víctor;Ahumada, Romina;Ajgaonkar, Nikhil;Filiz Ak, N.;Alam, Shadab;Allende Prieto, Carlos;Almeida, Andrés
• 通讯作者: Almeida, Andrés

The Recent LMC–SMC Collision: Timing and Impact Parameter Constraints from Comparison of Gaia LMC Disk Kinematics and N-body Simulations

• DOI: 10.3847/1538-4357/ac4e90
• 发表时间: 2022-01
• 期刊: The Astrophysical Journal
• 作者: Yumi Choi;K. Olsen;G. Besla;R. P. van der Marel;P. Zivick;N. Kallivayalil;D. Nidever