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NGC 2359

雷神的头盔星云
欧洲南方天文台成立50周年拍摄的雷神的头盔。
观测数据
（历元 J2000）
赤经07h 18m 30s[1]
赤纬-13° 13.8′ ″[1]
距离地球11,960[2]
所属星座大犬座
物理属性
显著特色电离氢区
其他名称GUM 4, LBN 227.66-00.09, SH 2-298, GRS 227.80 -00.20, LBN 1041, RCW 5[1]
参看：行星状星云、星云列表

NGC 2359（也称为雷神的头盔）是位于大犬座的一个发射星云[3]。 这个星云的距离大约是3,670秒差距（11,960光年），大小约30光年。在中心的是沃尔夫-拉叶星WR7，在演化成为超新星之前的一个短暂酷热巨星阶段。它在性质上类似泡泡星云，但与附近分子云的交互作用被认为对雷神的头盔弓形激波结构和更复杂的形状有所贡献。

它也被登录为Sh2-298和Gum 4[4]。

星云整体呈现气泡状，但有复杂的丝状结构。这个星云含数百颗太阳质量的电离物质，还有更多、数千太阳质量的未电离气体。大量的星际物质事由来自中心恒星的恒星风扫过，这些富含有些来自恒星核聚变的产物，有可能是直接来自恒星的星际物质[5]。星云不同部分的膨胀速率从10Km/s至30Km/s变化著，导致年龄的估计从78,500〜236,000年之间。在无线电和X射线波段对星云的研究，目前还不清楚在O型主序星发展的阶段，是颗红超巨星、高光度蓝变星还是沃夫-瑞叶星[2]。

图集

  • 雷神的头盔 - NGC 2359
    雷神的头盔 - NGC 2359
  • ESO拍摄的雷神的头盔 by ESO
    ESO拍摄的雷神的头盔 by ESO
  • 雷神的头盔， NGC 2359（核）
    雷神的头盔， NGC 2359（核）










参考资料

  1. ^ 1.0 1.1 1.2 Search Results for NGC 2359. Astronomical Database. SIMBAD. [5 October 2012]. （原始内容存档于2017-12-01）. 
  2. ^ 2.0 2.1 Zhekov, S. A. X-rays from wind-blown bubbles: An XMM-Newton detection of NGC 2359. Monthly Notices of the Royal Astronomical Society. 2014, 443: 12. Bibcode:2014MNRAS.443...12Z. arXiv:1406.2463 可免费查阅. doi:10.1093/mnras/stu1138. 
  3. ^ SEDS: NGC 2359. [2010-08-19]. （原始内容存档于2010-03-26）. 
  4. ^ The Gum Catalog. Galaxymap.org. [2013-10-06]. （原始内容存档于2013-07-16）. 
  5. ^ Cappa, C. E.; Goss, W. M.; Niemela, V. S.; Ostrov, P. G. A Study of Neutral and Ionized Gas of the Wolf-Rayet Ring Nebula NGC 2359. The Astronomical Journal. 1999, 118 (2): 948. Bibcode:1999AJ....118..948C. doi:10.1086/300995. 

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参见: 古姆星云
  • RCW 1
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NGC 2359
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