四边形：猎户座的中心
(原标题: Trapezium: At the Heart of Orion)
2024-01-05
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在这幅清晰的宇宙图像的中心附近，猎户座星云的中心，有四颗炽热的大质量恒星，被称为四边形。它们聚集在一个半径约1.5光年的区域内，主宰着密集的猎户座星云星团的核心。来自四边形恒星的紫外线电离辐射，主要来自最亮的猎户座-1 - C，为复杂的恒星形成区域的整个可见光提供了能量。大约300万年前，猎户座星云团在年轻的时候更加紧凑，一项动力学研究表明，早期失控的恒星碰撞可能形成了一个质量超过太阳100倍的黑洞。星团中黑洞的存在可以解释观察到的四边形恒星的高速度。猎户座星云的距离约为1500光年，这使它成为已知距离地球最近的黑洞之一。
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Near the center of this sharp cosmic portrait, at the heart of the Orion Nebula, are four hot, massive stars known as the Trapezium. Gathered within a region about 1.5 light-years in radius, they dominate the core of the dense Orion Nebula Star Cluster. Ultraviolet ionizing radiation from the Trapezium stars, mostly from the brightest star Theta-1 Orionis C powers the complex star forming region's entire visible glow. About three million years old, the Orion Nebula Cluster was even more compact in its younger years and a dynamical study indicates that runaway stellar collisions at an earlier age may have formed a black hole with more than 100 times the mass of the Sun. The presence of a black hole within the cluster could explain the observed high velocities of the Trapezium stars. The Orion Nebula's distance of some 1,500 light-years would make it one of the closest known black holes to planet Earth.
© Fred Zimmer