The Inner Workings of Starbursts and Their Winds

星爆及其风的内部运作

• 批准号: 2108140
• 负责人: Alberto Bolatto
• 金额: $ 55.02万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2108140&HistoricalAwards=false
• 关键词: Inner; Workings; Starbursts; Their; Winds

Astronomers have realized since the mid-1990s that the star formation in the Universe has not been constant, and that in fact, the star formation rate per unit volume has steadily decreased since attaining a peak at z ~ 2. While still not completely understood, this is thought to be due to a combination of a steady decrease in the inflow of pristine gas from the Cosmic Web, a more efficient mode of star formation in the past, and the effects of large-scale galactic winds from regions of intense star formation. This research centers on high spatial resolution sub/millimeter wavelength line and continuum observations of local starburst galaxies, where high efficiency star formation and associated wind-driven outflows occur, in order to better understand the physical processes driving star formation at its peak epoch (i.e., "cosmic noon"). This project will support two research graduate students and one undergraduate student, the latter participating in a side project working to increase STEM participation among minority populations.Using high angular resolution sub/millimeter and radio observations of the local starburst galaxies NGC 253, M82, and NGC 4945, this project will advance knowledge of the physical processes that shape their evolution. A key goal of this research is a better understanding of the physics of star formation “quenching" through (e.g.) observationally constraining the entrainment of cold gas in galactic scale wind-driven outflows powered by starbursts and the physical conditions in the outflowing gas that influence its fate. The research team will also measure basic properties of young, massive starburst clusters and improve our knowledge of the fraction of stars that form in them and determine how molecular gas properties vary among starburst galaxies. All these results will lead to more physically realistic numerical models of galaxy evolution. The researchers will place these results in the context of main sequence galaxies at the peak of cosmic star formation by comparing the physical state of the local starbursts with spatially resolved molecular properties in a new large galaxy sample (DYNAMO).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.

自20世纪90年代中期以来，天文学家已经意识到宇宙中的恒星形成并不是恒定的，事实上，每单位体积的恒星形成率在z ~ 2达到峰值后一直在稳步下降。虽然还没有完全理解，但这被认为是由于宇宙网原始气体流入的稳定减少，这是过去一种更有效的恒星形成模式，以及来自强烈恒星形成区域的大规模星系风的影响。本研究以高空间分辨率亚/毫米波长线为中心，对发生高效率恒星形成和相关风驱动外流的本地星暴星系进行连续观测，以便更好地了解在其高峰时期（即“宇宙正午”）驱动恒星形成的物理过程。该项目将支持两名研究生和一名本科生，后者将参与一个旨在提高少数民族人口参与STEM的副项目。通过对当地星暴星系NGC 253、M82和NGC 4945的高角度分辨率和射电观测，该项目将促进对形成它们演化的物理过程的了解。这项研究的一个关键目标是更好地理解恒星形成“淬火”的物理学，例如，通过观测限制星系尺度上由恒星爆发驱动的风驱动流出物的冷气体的携带，以及流出气体中影响其命运的物理条件。研究小组还将测量年轻的大质量星暴星团的基本特性，提高我们对其中形成的恒星比例的认识，并确定星暴星系中分子气体特性的变化。所有这些结果将导致更实际的星系演化数值模型。研究人员将把这些结果放在宇宙恒星形成高峰期的主序星系的背景下，通过比较一个新的大型星系样本（DYNAMO）中局部恒星爆发的物理状态和空间分辨的分子特性。该奖项反映了美国国家科学基金会的法定使命，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

The Morpho-kinematic Architecture of Super Star Clusters in the Center of NGC 253

NGC 253 中心超级星团的形态运动学结构

• DOI: 10.3847/1538-4357/ac7b7a
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Levy, Rebecca C.;Bolatto, Alberto D.;Leroy, Adam K.;Sormani, Mattia C.;Emig, Kimberly L.;Gorski, Mark;Lenkić, Laura;Mills, Elisabeth A. C.;Tarantino, Elizabeth;Teuben, Peter
• 通讯作者: Teuben, Peter

Stellar masses of clumps in gas-rich, turbulent disc galaxies

富含气体的湍流盘星系中的恒星团块

• DOI: 10.1093/mnras/stac622
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Ambachew, Liyualem;Fisher, Deanne B;Glazebrook, Karl;Girard, Marianne;Obreschkow, Danail;Abraham, Roberto;Bolatto, Alberto;Lenkić, Laura;Damjanov, Ivana
• 通讯作者: Damjanov, Ivana

The 30 Doradus Molecular Cloud at 0.4 pc Resolution with the Atacama Large Millimeter/submillimeter Array: Physical Properties and the Boundedness of CO-emitting Structures

阿塔卡马大型毫米/亚毫米阵列的 0.4 pc 分辨率的 30 Doradus 分子云：物理性质和共发射结构的有界性

• DOI: 10.3847/1538-4357/ac723a
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Wong, Tony;Oudshoorn, Luuk;Sofovich, Eliyahu;Green, Alex;Shah, Charmi;Indebetouw, Rémy;Meixner, Margaret;Hacar, Alvaro;Nayak, Omnarayani;Tokuda, Kazuki
• 通讯作者: Tokuda, Kazuki

The DUVET Survey: Resolved maps of star formation-driven outflows in a compact, starbursting disc galaxy

DUVET 巡天：在紧凑的星爆盘星系中恒星形成驱动的流出的解析图

• DOI: 10.1093/mnras/stac420
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Reichardt Chu, Bronwyn;Fisher, Deanne B.;Nielsen, Nikole M.;Chisholm, John;Girard, Marianne;Kacprzak, Glenn G.;Bolatto, Alberto;Herrera-Camus, Rodrigo;Sandstrom, Karin;Li, Miao
• 通讯作者: Li, Miao

ALMA Imaging of a Galactic Molecular Outflow in NGC 4945

NGC 4945 中星系分子流出的 ALMA 成像

• DOI: 10.3847/1538-4357/ac2c08
• 发表时间: 2021
• 期刊: The Astrophysical Journal
• 作者: Bolatto, Alberto D.;Leroy, Adam K.;Levy, Rebecca C.;Meier, David S.;Mills, Elisabeth A.;Thompson, Todd A.;Emig, Kimberly L.;Veilleux, Sylvain;Ott, Jürgen;Gorski, Mark
• 通讯作者: Gorski, Mark