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阿塔卡马大孔径亚毫米望远镜 (AtLAST) 科学:隐藏的环银河系媒介
Minju Lee1,2, Alice Schimek3, Claudia Cicone3
1Cosmic Dawn Center (DAWN), Copenhagen, Denmark.
Open research Europe
|October 28, 2024
概括
了解环银河系介质 (CGM) 是银河系进化的关键. 像AtLAST这样的新望远镜可以对CGM中的冷气体进行成像,揭示了对整个宇宙时间的星系形成的关键见解.
科学领域:
- 宇宙进化和星系形成研究.
- 环银河系介质 (CGM) 的表征.
背景情况:
- 星际介质 (ISM) 的知识是先进的,但环银河系介质 (CGM) 仍然不太了解.
- 作为一个扩散气体储库的CGM对于理解星系反和养机制至关重要.
- 在冷分子和原子阶段,CGM质量的很大一部分可能存在,特别是在高红移时.
研究的目的:
- 为了激励未来对冷CGM的观测,使用拟议的阿塔卡马大孔径亚毫米望远镜 (AtLAST).
- 为突出描绘星系进化研究的冷CGM气相的科学潜力.
- 概述AtLAST进行这些观测的技术要求.
主要方法:
- 利用理论和经验论证来支持未来的CGM观测.
- 专注于远红外和亚毫米辐射线 ([C ii],[O iii],[C I],CO) 来研究冷气.
- 定义了AtLAST的望远镜和仪器规格.
主要成果:
- 该研究提出了关于观察冷CGM的必要性的论点.
- 它确定了关键的排放线 ([C ii],[O iii],[C I],CO) 作为冷CGM气体的标记物.
- 它概述了像AtLAST这样的设施实现这些观测所需的能力.
结论:
- 通过像AtLAST这样的设备观察冷CGM对于了解星系进化的突破至关重要.
- 阿特拉斯特 (AtLAST) 提出的规格非常适合对这些以前不受约束的气相进行成像.
- 未来的观测将弥合ISM和光环尺度之间的差距,提供银河系生态系统的全面视图.
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