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NGC 6820和NGC 6823.
发射星云NGC 6820 与疏散星团NGC 6823星云 |
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![](https://upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Sh_2-86RGBHaRGBHunter.jpg/220px-Sh_2-86RGBHaRGBHunter.jpg) NGC 6820/NGC 6823 -礼貌猎人威尔逊 |
观测资料: J2000.0 epoch |
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赤经 | 19h 42m 27.92s[1] |
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赤纬 | +23° 05′ 14.7″[1] |
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距离 | 6,000 ly[2] 光年 |
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视尺度(V) | 40’ |
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星座 | 狐狸座 |
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名称 | 星云(NGC 6820,Sh2-86) |
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NGC 6820和NGC 6823是在狐狸座内包围着疏散星团 NGC 6823的一个发射星云,它的位置靠近M 27,也就是哑铃星云。这个星云也称为Sh2-86。
最显著的特征是在星云的东侧,靠近疏散星团NGC 6823西边,突起像是树干支柱的尘埃和气体。疏散星团的中心主要是许多年轻、明亮,年龄大约200万岁的蓝色恒星。星团的外侧贴近发射星云NGC 6820的支柱,包含星团中更为年轻的恒星。巨大的支柱可能是周围的气体和尘埃,受到邻近恒星的辐射推挤和侵蚀而堆砌成的。在星云中也可以看见气体和尘埃聚集成显著的暗球,数量多如巨蛇座的鹰星云和人马座的礁湖星云。
疏散星团NGC 6823的直径大约是50光年,距离大约6000光年[2],构成狐狸座OB1星协的核心[3]。
参考资料
- ^ 1.0 1.1 SIMBAD Astronomical Database. Results for NGC 6820. [2008-07-03]. (原始内容存档于2019-05-01).
- ^ 2.0 2.1 Nemiroff, R.; Bonnell, J. (编). Astronomy Picture of the Day. NASA https://apod.nasa.gov/apod/ap041004.html. 4 October 2004 [2008-07-03].
- ^ Billot, N.; Noriega-Crespo, A.; Carey, S.; Guieu, S.; Shenoy, S.; Paladini, R.; Latter, W. Young Stellar Objects and Triggered Star Formation in the Vulpecula Ob Association. The Astrophysical Journal. 2010, 712 (2): 797. Bibcode:2010ApJ...712..797B. arXiv:1003.0866
. doi:10.1088/0004-637X/712/2/797.
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