Mapping Molecular ISM in the Whole Disk of the Barred Spiral Galaxy M83

绘制棒旋星系 M83 整个盘面的分子 ISM 图谱

• 批准号: 2006600
• 负责人: Jin Koda
• 金额: $ 43.23万
• 依托单位: SUNY at Stony Brook
• 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=2006600&HistoricalAwards=false
• 关键词: Mapping; Molecular; ISM; Whole; Disk

Giant molecular clouds (GMCs) are an important factor in star formation in spiral galaxies and in the evolution of those galaxies. This project will use high resolution observations from the ALMA radio telescope to map out the CO gas content in M83 -- a nearby spiral galaxy. These observations will identify every GMC in this galaxy down to the lowest masses of 10,000 solar masses. This map will provide new insights on the connection between GMCs, star formation, spiral arms, and galaxy evolution. The project will also develop and provide support for radio instruments for educational uses in university courses.The project will take an unbiased census of the bulk molecular gas over the whole disk of M83, resolving the GMC distribution, scaling relations, mass function, and their spatial variations. It will characterize the CO 2-1/1-0 line ratio of every GMC over the whole disk and investigate its variations as a function of galactic structures and star formation activity. The simultaneous analysis of CO(1-0) and CO(2-1) over the entire disk will provide unique reference for future studies of ISM evolution in galaxies. The project will upgrade and redesign an educational radio interferometer for use in university courses. Part of this upgrade will be to shift the operating frequency to a band that is protected for research.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.

巨型分子云（GMC）是螺旋星系中恒星形成和这些星系演变的重要因素。该项目将使用来自ALMA射电望远镜的高分辨率观测值来绘制M83中的CO气体含量 - 附近的螺旋星系。这些观察结果将确定该星系中的每个GMC，直到10,000个太阳能的最低质量。该地图将提供有关GMC，恒星形成，螺旋臂和星系进化之间联系的新见解。该项目还将为大学课程中的教育用途提供并为无线电工具提供支持。该项目将在整个M83的整个磁盘上对散装分子气体进行公正的人口普查，从而解决GMC分布，扩展关系，质量功能，质量功能及其空间变体。它将表征整个磁盘上每个GMC的CO 2-1/1-0线比，并研究其变化是银河结构和恒星形成活性的函数。在整个磁盘上对CO（1-0）和CO（2-1）的同时分析将为未来对星系中ISM进化的研究提供独特的参考。该项目将升级并重新设计用于大学课程的教育无线电干涉仪。该升级的一部分将是将运营频率转移到一个受保护的乐队中。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，被认为值得通过评估来获得支持。

项目成果

First Detection of the Molecular Cloud Population in the Extended Ultraviolet Disk of M83

• DOI: 10.3847/1538-4357/ac9dfc
• 发表时间: 2022-08
• 期刊: The Astrophysical Journal
• 作者: J. Koda;L. Watson;F. Combes;M. Rubio;S. Boissier;M. Yagi;D. Thilker;A. Lee;Y. Komiyama;K. Morokuma-Matsui;C. Verdugo

Diverse Molecular Structures across the Whole Star-forming Disk of M83: High-fidelity Imaging at 40 pc Resolution

• DOI: 10.3847/1538-4357/acc65e
• 发表时间: 2023-03
• 期刊: The Astrophysical Journal
• 作者: J. Koda;A. Hirota;F. Egusa;K. Sakamoto;T. Sawada;M. Heyer;J. Baba;S. Boissier;D. Calzetti;J. Donovan Meyer;B. Elmegreen;A. Gil de Paz;N. Harada;L. Ho;Masato I. N. Kobayashi;N. Kuno;A. Lee;B. Madore;F. Maeda;Sergio Martín;K. Muraoka;K. Nakanishi;S. Onodera;J. Pineda;N. Scoville;Yoshimasa Watanabe