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。
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
.
DOI: 10.7523/j.ucas.2022.040
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.
[1] van den Bergh S. The posteruptive galaxy NGC 5253[J].Publications of the Astronomical Society of the Pacific,1980,92:122. DOI:10.1086/130631.
[2] Sakai S, Ferrarese L, Kennicutt R C Jr, et al. The effect of metallicity on Cepheid-based distances[J].The Astrophysical Journal Letters,2004,608(1):42-61. DOI:10.1086/386540.
[3] Thim F, Tammann G A, Saha A, et al.The Cepheid distance to NGC 5236(M83) with the ESO very large telescope[J]. The Astrophysical Journal Letters, 2003, 590(1):256-270.DOI:10.1086/374888.
[4] Miller E D,Bregman J N. High-velocity clouds in M 83 and M 51[EB/OL].(2004-10-08)[2022-03-03].2004: arXiv:astro-ph/0410238. https://arxiv.org/abs/astro-ph/0410238.
[5] Turner J L. Submillimeter view of gas and dust in the forming super star cluster in NGC 5253[EB/OL].(2015-09-28)[2022-03-03].2015: arXiv:1509.08531[astro-ph.GA]. https://arxiv.org/abs/1509.08531.
[6] Kobulnicky H A, Skillman E D. The peculiar HI kinematics of the wolf-rayet starburst galaxy NGC 5253[J]. The Astrophysical Journal Letters,1995,454(2):L121. DOI: 10.1086/309791.
[7] Sardone A,Pisano D J,Pingel N M,et al. A census of the extended neutral hydrogen around 18 MHONGOOSE galaxies[J]. The Astrophysical Journal Letters, 2021, 910(1):69.DOI:10.3847/1538-4357/abde45.
[8] López-Sánchez Á R, Koribalski B S, van Eymeren J,et al. The intriguing HI gas in NGC 5253: an infall of a diffuse, low-metallicity HI cloud?[J]. Monthly Notices of the Royal Astronomical Society,2012,419(2):1051-1069. DOI:10.1111/j.1365-2966.2011.19762.x.
[9] Price-Whelan A M, Sipöcz B M, Günther H M,et al. The astropy project: building an open-science project and status of the v2.0 core package[J]. The Astronomical Journal,2018,156(3):123.DOI:10.3847/1538-3881/aabc4f.
[10] Robitaille T P, Tollerud E J, Greenfield P, et al. Astropy: a community Python package for astronomy[J]. Astronomy & Astrophysics,2013,558:A33. DOI: 10.1051/0004-6361/201322068.
[11] Ginsburg A, Koch Eric, Koch E,et al. radio-astro-tools/spectral-cube: v0.4.4[EB/OL]. (2019-02-20)[2022-03-03].https://zenodo.org/record/2573901.
[12] Thilker D A, Braun R, Walterbos R A M, et al. On the continuing formation of the andromeda galaxy: detection of HI clouds in the M31 halo[J]. The Astrophysical Journal Letters, 2004,601(1):L39-L42. DOI:10.1086/381703.
[13] Koribalski B S, Staveley-Smith L, Kilborn V A,et al. The 1000 brightest HIPASS galaxies: HI properties[J]. The Astronomical Journal,2004,128(1):16-46. DOI:10.1086/421744.
[14] Roberts M S. A study of neutral hydrogen in IC 10[J]. The Astronomical Journal，1962，67：431. DOI:10.1086/108751.
[15] Lauberts A, Valentijn E A. The surface photometry catalogue of the ESO-Uppsala galaxies[EB/OL]. (1989)[2022-03-03].https://ui.adsabs.harvard.edu/abs/1989spce.book……L/abstract.
[16] Caldwell N,Phillips M M. Star formation in NGC 5253[J]. The Astrophysical Journal Letters, 1989,338:789.DOI:10.1086/167236.
