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象鼻管星云

象鼻管星云
星云
史匹哲太空望远镜拍摄的星云。
观测资料
距离2,400 光年
星座仙王座
相关条目:星云列表

象鼻管星云是位于仙王座巨大的游离气体区域IC 1396内,距离地球约2,400光年的星际物质高度集中区域[1]。这块星云被称为IC 1396A,呈现出黑暗、高密度的球状。由于在可见光的波长下,这里是一个有着明亮蜿蜒边缘的黑暗斑块,因此俗称为象鼻管星云。明亮的边缘是这团云气被就在其西侧,非常明亮的大质量恒星HD 206267照亮和电离的表面。在上面的图中,大质量恒星就在图像左边的边缘。除了可以保护自己免受恒星强烈的紫外线电离的致密小球体,都整个IC 1396的区域都是被这颗大质量恒星照亮的 。 象鼻管星云现在被认为是恒星形成的区域,包含几颗在2003年的红外线影响中被发现,非常年轻(年龄低于100,000年)的恒星,以及两颗比较老(已经有几亿年,但因为这些恒星可以生活数十亿年,所以还算是年轻的恒星。),都存在于凸出的小的圆形空腔内。而空腔应该是这些年轻恒星的恒星风吹出来的。

结合来自大质量恒星的光造成气体云的边缘被电离和压缩,和年轻恒星从中心向外吹的恒星风造成气体移动的行动,使得象鼻管星云受到非常高的挤压。这些压力引发了当前这一代的原恒星[2][3]

参考资料

  1. ^ Matthews, H. I. High resolution radio observations of bright rims in IC 1396. Astronomy and Astrophysics. 1979, 75: 345–350. Bibcode:1979A&A....75..345M. 
  2. ^ Barentsen, G. T Tauri candidates and accretion rates using IPHAS: method and application to IC1396. Monthly Notices of the Royal Astronomical Society. 2011. Bibcode:2011MNRAS.415..103B. arXiv:1103.1646可免费查阅. doi:10.1111/j.1365-2966.2011.18674.x. 
  3. ^ Getman, K. V.; et al. The Elephant Trunk Nebula and the Trumpler 37 cluster: contribution of triggered star formation to the total population of an H II region. Monthly Notices of the Royal Astronomical Society. 2012, 426 (4): 2917–2943. Bibcode:2012MNRAS.426.2917G. arXiv:1208.1471可免费查阅. doi:10.1111/j.1365-2966.2012.21879.x. 

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象鼻管星云
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