星暴矮星系NGC 5253周围的中性氢气体分布

doi:10.7523/j.ucas.2022.040

中国科学院大学学报 ›› 2024, Vol. 41 ›› Issue (2): 188-194.DOI: 10.7523/j.ucas.2022.040

星暴矮星系NGC 5253周围的中性氢气体分布

沃佳怡^1,2,3, 蔡肇伟^3,4,5, 左沛⁶, 陈天禄^1,2

1 西藏大学宇宙线教育部重点实验室, 拉萨 850000;
2 西藏大学理学院物理系, 拉萨 850000;
3 中国科学院国家天文台, 北京 100101;
4 中国科学院大学天文与空间科学学院, 北京 101408;
5 中国科学院FAST重点实验室, 北京 100101;
6 北京大学科维理天文与天体物理研究所, 北京 100871

收稿日期:2022-03-09 修回日期:2022-04-15 发布日期:2022-04-26
通讯作者: 蔡肇伟,E-mail:cwtsai@nao.ac.cn;陈天禄,E-mail:chentl@utibet.edu.cn
基金资助:
国家自然科学基金 (12041302，11903003，11873005，12147218)资助

HI distribution in dwarf starburst galaxy NGC 5253

WO Jiayi^1,2,3, TSAI Chao-Wei^3,4,5, ZUO Pei⁶, CHEN Tianlu^1,2

1. Key Laboratory of Cosmic Rays of Ministry of Education, Tibet University, Lhasa 850000, China;
2. Department of Physics, College of Science, Tibet University, Lhasa 850000, China;
3. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China;
4. School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, China;
5. CAS Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China;
6. Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China

Received:2022-03-09 Revised:2022-04-15 Published:2022-04-26

摘要/Abstract

摘要： 中性氢(HI)气体是恒星形成的基本物质，驱动着星系的演化。对于星暴矮星系NGC 5253，过去的研究利用射电干涉阵观测到的HI气体呈不对称分布，向东北方向延伸约7 kpc。这一延展结构可能表明NGC 5253与其附近的旋涡星系M 83之间存在动力学联系。为研究这两个星系之间可能存在的HI气体连接，从绿岸望远镜获得了射电L波段对NGC 5253周围的HI成图数据，探测到NGC 5253和M 83之间可能存在的7个HI气体云团。这些HI气体云团候选体主要分布在东北方向，由NGC 5253延展至距离超过60 kpc外。这些气体云团可能在触发矮星系NGC 5253剧烈的恒星形成活动中发挥重要作用。

关键词: 星系相互作用, 恒星形成, 中性氢气体, NGC 5253

Abstract: Neutral hydrogen (HI) gas is the fundamental material for star formation that drives the evolution of a galaxy. For starburst dwarf galaxy NGC 5253, previous study has observed HI gas distributed asymmetrically with ~7 kpc extension toward north-east direction using the radio interferometry. This extension is likely indicating the dynamical connection between NGC 5253 and its nearby spiral galaxy M 83. To investigate the possible HI bridge between these two galactic systems, we acquire the HI mapping data around NGC 5253 in radio L-band from the Robert C. Byrd Green Bank Telescope. We have detected the 7 possible HI gas clouds between NGC 5253 and M 83. These HI gas cloud candidates distribute mainly in the north-east direction extending over 60 kpc from NGC 5253. These clouds could play an important role in triggering intensive star formation activity in the dwarf galaxy NGC 5253.

Key words: galaxy interaction, star formation, neutral hydrogen gas, NGC 5253

中图分类号:

P157.7

沃佳怡, 蔡肇伟, 左沛, 陈天禄. 星暴矮星系NGC 5253周围的中性氢气体分布[J]. 中国科学院大学学报, 2024, 41(2): 188-194.

WO Jiayi, TSAI Chao-Wei, ZUO Pei, CHEN Tianlu. HI distribution in dwarf starburst galaxy NGC 5253[J]. Journal of University of Chinese Academy of Sciences, 2024, 41(2): 188-194.

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星暴矮星系NGC 5253周围的中性氢气体分布

HI distribution in dwarf starburst galaxy NGC 5253

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