逃亡之星阿尔法羚羊
(原标题: Runaway Star Alpha Camelopardalis)
2023-04-28
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就像一艘船在宇宙的海洋中航行一样，逃逸的恒星阿尔法驼峰产生了这种优雅的弧形弓形波或弓形激波。这颗巨大的超巨星以每秒60公里的速度在太空中移动，压缩了其路径上的星际物质。在这个近6度宽的视野的中心，Alpha Cam的质量大约是太阳的25-30倍，温度是太阳的5倍（30,000开尔文），亮度超过500,000倍。在大约4000光年远的长颈鹿豹座，这颗恒星也会产生强烈的恒星风。阿尔法卡姆的弓形激波距离恒星本身大约10光年。是什么使这颗恒星运动起来的？长期以来，天文学家一直认为，由于与其他星团成员的引力相互作用，或者可能是由于一颗大质量伴星的超新星爆炸，阿尔法卡姆被抛出了附近一个年轻的热恒星星团。
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Like a ship plowing through cosmic seas, runaway star Alpha Camelopardalis has produced this graceful arcing bow wave or bow shock. The massive supergiant star moves at over 60 kilometers per second through space, compressing the interstellar material in its path. At the center of this nearly 6 degree wide view, Alpha Cam is about 25-30 times as massive as the Sun, 5 times hotter (30,000 kelvins), and over 500,000 times brighter. About 4,000 light-years away in the long-necked constellation Camelopardalis, the star also produces a strong stellar wind. Alpha Cam's bow shock stands off about 10 light-years from the star itself. What set this star in motion? Astronomers have long thought that Alpha Cam was flung out of a nearby cluster of young hot stars due to gravitational interactions with other cluster members or perhaps by the supernova explosion of a massive companion star.