CoCoA: Cold Cores with the Atacama Large Millimeter/submillimeter Array (ALMA)

CoCoA：采用阿塔卡马大型毫米/亚毫米阵列 (ALMA) 的冷芯

基本信息

批准号：
2309542
负责人：
Thushara Pillai
金额：
$ 48万
依托单位：
Massachusetts Institute of Technology
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2023
资助国家：
美国
起止时间：
2023-01-01 至 2024-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2309542&HistoricalAwards=false
关键词：
CoCoA Cold Cores Atacama Large

项目摘要

Understanding star formation is one of the most fundamental problems in astrophysics. Most of the stars in the Universe form in dense clusters. Low-mass stars, like our own Sun, are much more commonly formed in star clusters. High-mass stars, that are at least eight-times more massive than the Sun, on the other hand, are very rare. High mass stars live a short, but very bright, life characterized by their strong stellar winds, and sometimes a death in supernovae explosions. The investigators will test models that high-mass stars originate in "cores" where many solar masses of dense gas are concentrated into a small volume. In the investigator’s CoCoA project, they surveyed these high-mass cores with NSF’s Atacama Large Millimeter/Submillimeter Array (ALMA) observatory. The investigator will test predictions that high-mass are born in cold high-mass cores that are very turbulent. An international team of collaborators, that includes observers as well as theorists, will support this work. Custom-made numerical simulations will be used to study source properties in detail. Some of the analysis tools will be transformed into simple high-school level experiments that will be introduced to students via a local community center. The investigator seeks to introduce the scientific process to minority students.The CoCoA project has performed a systematic search for the earliest phase of high-mass star formation that builds on the ATLASGAL survey at 870 mu wavelength that covers the entire inner Galactic plane. The clumps extracted for the survey are massive, dense, and devoid of infrared sources up to 70 mu wavelengths. Using sensitive high-resolution ALMA data towards all potential candidate starless high-mass clumps within 5 kpc, CoCoA will reveal if there are any high-mass cores embedded within these clumps. The investigators will deliver information on the internal density and temperature structure of high-mass cores, and robust constraints on the lifetimes of the elusive early phase of high-mass star formation, at an unprecedented level of detail. This will involve detailed studies of the fragmentation properties of the high-mass clumps. The ALMA-based dust polarization data for a small sub-sample will tell us whether magnetic fields play any role in the early phase of high-mass star formation. In summary, the synthesis of this massive dataset will place stringent constraints on the existing theories on high-mass star 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.

了解恒星形成是天体物理学中最根本的问题之一。宇宙中的大多数恒星都以致密的簇形式。像我们自己的太阳一样，低质量的星星在星团中更常见。另一方面，高质量恒星至少比太阳高八倍。高质量明星的生活很短，但非常明亮，其生活为特征，其特征是他们强烈的恒星风，有时在超新星爆炸中死亡。研究人员将测试高质量恒星起源于“核心”的模型，其中许多太阳能密集的气体集中在少量体积中。在调查员的可可项目中，他们通过NSF的Atacama大毫米/亚毫米阵列（ALMA）观察对这些高质量核心进行了调查。研究者将测试高质量的预测，这些预测出生在非常动荡的冷质量核心中。包括观察者和理论在内的国际合作者团队将支持这项工作。定制数值模拟将用于详细研究源属性。一些分析工具将转变为简单的高中级实验，这些实验将通过当地社区中心介绍给学生。研究人员旨在向少数群体学生介绍科学过程。可可项目已经进行了系统的搜索，以在870 MU波长的Atlasgal调查上进行最早的高质量恒星形成阶段，该阶段涵盖了整个内部银河层面。提取的调查的夹具大量，密集且没有红外源高达70 MU波长。可可使用敏感的高分辨率ALMA数据对所有潜在的无星高质量夹，可可在这些夹子中是否嵌入了任何高质量核心。研究人员将在前所未有的细节水平上提供有关高质量核心内部密度和温度结构的信息，并对高质量恒星形成的弹性早期阶段的寿命进行牢固的限制。这将涉及对高质量夹的碎片特性的详细研究。小子样本的基于ALMA的尘埃极化数据将告诉我们磁场是否在高质量恒星形成的早期阶段起任何作用。总而言之，该大规模数据集的综合将对高质量星形成的现有理论施加严格的限制。该奖项反映了NSF的法定任务，并通过使用该基金会的知识分子和更广泛的影响审查标准来通过评估来诚实地支持支持。

项目成果

期刊论文数量（7）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Fragmentation of the High-mass “Starless” Core G10.21-0.31: A Coherent Evolutionary Picture for Star Formation

DOI：
10.3847/1538-4357/acb211
发表时间：
2023-01
期刊：
The Astrophysical Journal
影响因子：
0
作者：
Wenyu Jiao;Ke Wang;T. Pillai;T. Baug;Siju Zhang;F. Xu
通讯作者：
Wenyu Jiao;Ke Wang;T. Pillai;T. Baug;Siju Zhang;F. Xu

The Haystack Telescope as an Astronomical Instrument

DOI：
10.3390/galaxies11010009
发表时间：
2023-01
期刊：
Galaxies
影响因子：
2.5
作者：
J. Kauffmann;G. Rajagopalan;K. Akiyama;V. Fish;C. Lonsdale;L. Matthews;T. Pillai
通讯作者：
J. Kauffmann;G. Rajagopalan;K. Akiyama;V. Fish;C. Lonsdale;L. Matthews;T. Pillai

The distance to the Serpens South cluster from H 2 O masers

H 2 O脉泽到巨蛇南星团的距离

DOI：
10.1051/0004-6361/202346369
发表时间：
2023
期刊：
Astronomy & Astrophysics
影响因子：
6.5
作者：
Ortiz-León, Gisela N.;Dzib, Sergio A.;Loinard, Laurent;Gong, Yan;Pillai, Thushara;Plunkett, Adele
通讯作者：
Plunkett, Adele

Infall and outflow towards high-mass starless clump candidates

流入和流出大质量无星团簇候选者

DOI：
10.1093/mnras/stad1073
发表时间：
2023
期刊：
Monthly Notices of the Royal Astronomical Society
影响因子：
4.8
作者：
Pillai, T. G. S.;Urquhart, J. S.;Leurini, S.;Zhang, Q.;Traficante, A.;Colombo, D.;Wang, K.;Gomez, L.;Wyrowski, F.
通讯作者：
Wyrowski, F.

CMZoom III: Spectral line data release

CMZoom III：谱线数据发布

DOI：
10.1093/mnras/stad388
发表时间：
2023
期刊：
Monthly Notices of the Royal Astronomical Society
影响因子：
4.8
作者：
Callanan, Daniel;Longmore, Steven N.;Battersby, Cara;Hatchfield, H. Perry;Walker, Daniel L.;Henshaw, Jonathan;Keto, Eric;Barnes, Ashley;Ginsburg, Adam;Kauffmann, Jens
通讯作者：
Kauffmann, Jens