M33的氢云
(原标题: Hydrogen Clouds of M33)
2023-10-13
浏览次数: 17
华丽的螺旋星系梅西耶33似乎有更多的发光氢气。M33是本星系群的一个重要成员，也被称为三角星系，距离我们只有300万光年。在这幅清晰的星系肖像中，我们可以看到这个星系的中心三万光年左右。这幅肖像描绘了M33的红色电离氢云或HII区域。沿着松散的旋臂蜿蜒向核心，M33巨大的HII区域是已知最大的恒星托儿所之一，是短寿命但质量非常大的恒星形成的地方。来自明亮的大质量恒星的强烈紫外线辐射电离了周围的氢气，最终产生了特有的红光。在这幅图像中，宽带数据与通过氢- α滤波器记录的窄带数据结合在一起。这种滤光片能透射出最强烈的可见氢发射线。
查看原文解释
Gorgeous spiral galaxy Messier 33 seems to have more than its fair share of glowing hydrogen gas. A prominent member of the local group of galaxies, M33 is also known as the Triangulum Galaxy and lies a mere 3 million light-years away. The galaxy's central 30,000 light-years or so are shown in this sharp galaxy portrait. The portrait features M33's reddish ionized hydrogen clouds or HII regions. Sprawling along loose spiral arms that wind toward the core, M33's giant HII regions are some of the largest known stellar nurseries, sites of the formation of short-lived but very massive stars. Intense ultraviolet radiation from the luminous, massive stars ionizes the surrounding hydrogen gas and ultimately produces the characteristic red glow. In this image, broadband data were combined with narrowband data recorded through a hydrogen-alpha filter. That filter transmits the light of the strongest visible hydrogen emission line.
© Reinhold Wittich