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，单位体积的恒星形成率自在 z ~ 2 处达到峰值以来一直在稳步下降。虽然尚未完全了解，这被认为是由于来自宇宙网的原始气体流入量的稳定减少（过去一种更有效的恒星形成模式）以及来自密集恒星形成区域的大规模银河风的影响所致。这项研究的重点是高空间分辨率亚/毫米波长线和对局部星暴星系的连续观测，其中发生了高效率的恒星形成和相关的风驱动流出，以便更好地了解在其峰值时期（即恒星形成）驱动恒星形成的物理过程。 ，“宇宙正午”）该项目将支持两名研究研究生和一名本科生，后者参与一个旨在提高少数族裔群体对 STEM 参与度的副项目。使用高角分辨率通过对本地星暴星系 NGC 253、M82 和 NGC 4945 进行亚/毫米和射电观测，该项目将增进对塑造其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了解恒星形成的物理学。通过（例如）观测限制由星暴驱动的银河级风驱动流出物中冷气体的夹带以及影响流出气体的物理条件来“淬灭”研究小组还将测量年轻的大质量星暴星团的基本特性，并提高我们对其中形成的恒星比例的了解，并确定星暴星系中分子气体特性的变化。所有这些结果将带来更真实的物理结果。研究人员将通过将局部星暴的物理状态与新的大型星系样本（DYNAMO）中的空间分辨分子特性进行比较，将这些结果置于宇宙恒星形成高峰的主序星系的背景下。这授予 NSF 的法定使命，并通过评估反映使用基金会的智力优点和更广泛的影响审查标准，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

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

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