HI distribution in dwarf starburst galaxy NGC 5253

doi:10.7523/j.ucas.2022.040

Journal of University of Chinese Academy of Sciences ›› 2024, Vol. 41 ›› Issue (2): 188-194.DOI: 10.7523/j.ucas.2022.040

• Research Articles • Previous Articles Next Articles

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 Online:2024-03-15

Abstract

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

CLC Number:

P157.7

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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HI distribution in dwarf starburst galaxy NGC 5253

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