| H_2的中红外波段研究进展 |
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| 引用本文： | 周叶艳,郝蕾.H_2的中红外波段研究进展[J].天文学进展,2019(1):1-15. |
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| 作者姓名： | 周叶艳 郝蕾 |
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| 作者单位： | 中国科学院上海天文台星系与宇宙学重点实验室;中国科学院大学 |
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| 基金项目： | 国家自然科学基金(NSFC11473055;NSFCU1831205;NSFC11603058) |
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| 摘 要： | 近年来红外望远镜的发展使得研究人员可以利用红外光谱数据探测到H_2的旋转谱线。这些谱线来源于"温"的分子气体。首先介绍关于H_2辐射的研究现状以及目前的研究热点,然后着重讨论在中红外波段观测到的H_2辐射与恒星形成以及与总分子气体质量之间的关系。对使用不同方法和不同数据的工作进行数据和方法的交叉检验后发现:在恒星形成星系中,H_2在中红外波段的辐射与恒星形成相关,而在活动星系核中是由激波激发,与恒星形成无关;另外,星系中的总分子气体质量可由H_2在中红外波段的辐射通过建模推出。从不同类型的星系推出的总分子气体质量与H_2辐射的相关性不明显,但总分子气体表面密度与H_2辐射有一定的相关性。从几个方面对这一结果进行解释。最后,对全文进行了总结并对未来的研究做出展望。
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| 关 键 词： | H2 恒星形成 分子气体质量 活动星系核 星系演化 |
Studies of Molecular Hydrogen in Mid-infrared |
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| ZHOU Ye-yan,HAO Lei.Studies of Molecular Hydrogen in Mid-infrared[J].Progress In Astronomy,2019(1):1-15. |
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| Authors: | ZHOU Ye-yan HAO Lei |
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| Institution: | (Key Laboratory for Research in Galaxies and Cosmology,Shanghai Astronomical Observatory,Chi-nese Academy of Sciences,Shanghai 200030,China;University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | Stars form in the contraction of cold gas cloud,and molecular hydrogen H2 is the main composition of molecular cloud,so H2 can be regarded as the main initial fuel reserves of star formation.Access to the knowledge of the molecular gas can help us understand the starforming in galaxies better.Although H2 is very rich in starburst,but in the cold interstellar medium,H2 can’t be observed directly because it can not radiate effectively.Until recently,the development of infrared telescopes allows researchers to detect molecular hydrogen rotational lines through infrared spectroscopy.Firstly,we introduce the recent observational results of molecular hydrogen and the present situation.Then we focus on the relevance between molecular hydrogen in mid-infrared and star formation as well as the relationship between H2 radiation and the total quality of molecular gas.We crosscheck the previous work of different method and data,and then we find:H2 emission in mid-infrared is relevant to star formation in star-forming galaxies but not in AGNs;H2 emission in mid-infrared correlates with surface density of total molecular gas and we also give our explanations from several aspect.Finally,we summarize the results and discuss prospect for the future studies. |
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| Keywords: | molecular hydrogen star formation molecular gas mass active galactic nuclei galactic evolution |
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