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阿塔卡马大孔径亚毫米望远镜 (AtLAST) 科学:调查遥远的宇宙
Eelco van Kampen1, Tom Bakx2, Carlos De Breuck1
1European Southern Observatory, Garching bei München, Bayern, 85748, Germany.
Open research Europe
|October 15, 2024
概括
阿塔卡马大孔径亚毫米望远镜 (AtLAST) 将能够对高红移星系进行全面研究,包括尘土的恒星形成群体,以了解宇宙进化. 这个强大的望远镜将提供关于星系属性和宇宙学参数的关键数据.
科学领域:
- 天文学和天体物理学
- 宇宙学的宇宙学是什么?
- 银河系的进化 银河系的进化
背景情况:
- 在星系形成的高峰期 (红移1 < z < 3),尘埃掩盖了恒星形成,在毫米/毫米以下波长可观测的红外波段重新发射光.
- 观测高红移星系群体需要敏感,高分辨率的小毫米调查,具有广泛的频率覆盖,用于光谱红移测定.
研究的目的:
- 推出拟议的50米阿塔卡马大孔径亚毫米望远镜 (AtLAST) 作为观测高红移星系的解决方案.
- 详细说明AtLAST用于研究尘土星系形成的星系及其属性 (气体含量,恒星形成率,尘埃质量/温度) 的能力,直至z ~ 7.
- 通过线强度测绘来证明AtLAST对宇宙学测量的潜力,包括增长率 (fσ8),哈勃常数和宇宙膨胀历史.
主要方法:
- 使用大型单盘子子子毫米望远镜 (AtLAST) 进行快速映射,高灵敏度和高角度分辨率.
- 采用宽带,光谱分辨率和多重光谱的能力,用于直接的毫米光谱.
- 设计深入和广泛的调查,包括对原始集群的有针对性的观察.
主要成果:
- AtLAST将使整个高z星系群体的研究成为可能,包括尘埃遮蔽的系统.
- 关于气体含量,冷却预算,恒星形成率,尘埃质量和尘埃温度的全面数据将可用于高达z ~ 7个星系.
- 使用AtLAST的调查可以准确地测量诸如fσ8和哈勃常数等宇宙学参数.
结论:
- 亚特拉斯特处于一个独特的位置,可以彻底改变对高红移星系及其演变的研究.
- 该望远镜的功能将大大提高我们对星系形成和早期宇宙的理解.
- AtLAST将通过先进的观测技术,如线强度绘图,为宇宙膨胀史提供关键的约束.
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