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.

巨分子云（GMC）是螺旋星系中恒星形成和这些星系演化的重要因素。该项目将利用 ALMA 射电望远镜的高分辨率观测来绘制附近螺旋星系 M83 中的二氧化碳含量。这些观测结果将识别该星系中最小质量为 10,000 个太阳质量的每个 GMC。这张地图将为 GMC、恒星形成、旋臂和星系演化之间的联系提供新的见解。该项目还将开发并为大学课程中教育用途的无线电仪器提供支持。该项目将对整个 M83 圆盘上的大分子气体进行无偏普查，解决 GMC 分布、比例关系、质量函数及其空间变化。它将描述整个盘上每个 GMC 的 CO 2-1/1-0 线比，并研究其随星系结构和恒星形成活动的变化。对整个盘面CO(1-0)和CO(2-1)的同时分析将为未来研究星系ISM演化提供独特的参考。该项目将升级和重新设计用于大学课程的教育无线电干涉仪。此次升级的一部分是将工作频率转移到受研究保护的频段。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

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