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arXiv 2005.01761astro-ph.GA
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哈勃太空望远镜观测到的大质量恒星形成

Massive Star Formation in the Ultraviolet Observed with the Hubble Space Telescope

Claus Leitherer

摘要:

综述了大质量恒星形成的紫外光谱观测及其解释。在简要的历史回顾之后,介绍了两个研究得很好的星团和周围的H II区:大麦云星云中的NGC 2070和M33中的NGC 604。这些区域可以作为研究更遥远星系团的训练集,这些星系团不再能够被分解为单个恒星。本书介绍了在本星系群之外的邻近宇宙中,对最近形成的星团和恒星形成星系中的扩展区域的观测。它们的解释依赖于光谱合成模型。这种模式的成功和失败进行了讨论,并强调了未来的发展方向。我提出了一个案例研究的非凡的星团和巨大的H II地区的蓝色紧凑星系II Zw 40。这篇评论最后预览了两个即将到来的哈勃太空望远镜计划:ULLYSES,对附近星系中大质量恒星的调查,以及CLASSY,对恒星形成星系中大质量星团的研究。

英文摘要:

Spectroscopic observations of a massive star formation in the ultraviolet and their interpretation are reviewed. After a brief historical retrospective, two well-studied resolved star clusters and the surrounding H II regions are introduced: NGC 2070 in the Large Magellanic Cloud and NGC 604 in M33. These regions serve as a training set for studies of more distant clusters, which can no longer be resolved into individual stars. Observations of recently formed star clusters and extended regions in star-forming galaxies in the nearby universe beyond the Local Group are presented. Their interpretation relies on spectral synthesis models. The successes and failures of such models are discussed, and future directions are highlighted. I present a case study of the extraordinary star cluster and giant H II region in the blue compact galaxy II Zw 40. The review concludes with a preview of two upcoming Hubble Space Telescope programs: ULLYSES, a survey of massive stars in nearby galaxies, and CLASSY, a study of massive star clusters in star-forming galaxies.

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