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arXiv 1903.04525astro-ph.GA
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Astro2020科学白皮书:星系中心气体和恒星的生命周期是什么?

Astro2020 Science White Paper: What is the lifecycle of gas and stars in galaxy centers?

Adam Ginsburg, Elisabeth A. C. Mills, Cara D. Battersby, Steven N. Longmore, J. M. Diederik Kruijssen

摘要:

最近的星系中心,我们自己的中央分子区(CMZ;银河系的中央500 pc),是一个强大的实验室,用于研究在宇宙时间内塑造星系的长期过程,从大规模气体流动和恒星形成到恒星反馈和与中央超大质量黑洞的相互作用。过去十年的研究表明,星系中心的气体转化为恒星的过程与星系盘中的不同。CMZ是唯一一个我们可以识别和衡量单个正在形成的恒星的星系中心,因此它是在整个宇宙历史中主导恒星形成的条件下建立恒星形成和反馈的物理定律的关键位置。对银河系内部千秒差距(约10度)内的分子和原子气体进行大规模调查将需要单碟射电望远镜的有效测绘能力。详细描述恒星形成过程需要对原恒星种群和小尺度气体结构进行大规模,高分辨率的调查,并在阿塔卡马大型毫米/亚毫米阵列上进行专门调查,最终使用詹姆斯韦伯太空望远镜,下一代甚大阵列和起源太空望远镜。

英文摘要:

The closest galaxy center, our own Central Molecular Zone (CMZ; the central 500 pc of the Milky Way), is a powerful laboratory for studying the secular processes that shape galaxies across cosmic time, from large-scale gas flows and star formation to stellar feedback and interaction with a central supermassive black hole. Research over the last decade has revealed that the process of converting gas into stars in galaxy centers differs from that in galaxy disks. The CMZ is the only galaxy center in which we can identify and weigh individual forming stars, so it is the key location to establish the physical laws governing star formation and feedback under the conditions that dominate star formation across cosmic history. Large-scale surveys of molecular and atomic gas within the inner kiloparsec of the Milky Way (~10 degrees) will require efficient mapping capabilities on single-dish radio telescopes. Characterizing the detailed star formation process will require large-scale, high-resolution surveys of the protostellar populations and small-scale gas structure with dedicated surveys on the Atacama Large Millimeter/submillimeter Array, and eventually with the James Webb Space Telescope, the Next Generation Very Large Array, and the Origins Space Telescope.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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