星系、喷流与黑洞
影像来源与版权:NASA, JPL-Caltech, Event Horizon Telescope Collaboration

说明:地球事件视界望远镜拍摄的首张黑洞影像,是明亮椭圆星系M87内的超大质量黑洞之身影。在这张由史匹哲太空望远镜拍摄的红外光影像里的泛蓝天体,即是距离5千5百万光年远室女室星系团里庞大无比的成员M87。虽然M87乍看之下,形似一朵没有太多特征的云团,然而史匹哲影像还是能解析出,从这个星系中心区喷出的相对论性喷流。右上方嵌图所呈现的这道喷流,长度绵延了数千光年。这道喷流较明亮的右侧分支,流向我们,其方向和我们的视线相去不远。基本不可见离我们远去的左侧分支,冲撞激震物质并造成了一道暗淡的光弧。影像右下的嵌图则是历史性的黑洞影像,影像并标黑洞与这个庞大星系的核心及相对论性喷流之相对关系。而环拱在史匹哲影像完全无法分辨的超大质量黑洞周围之内坠物质,则是驱动这道相对论性喷流,从活跃星系M87的核心喷出的庞大能源。
翻译:“每日一天文图”成大物理分站

The Galaxy, the Jet, and the Black Hole
Image Credit & Copyright: NASA, JPL-Caltech, Event Horizon Telescope Collaboration

Explanation: Bright elliptical galaxy Messier 87 (M87) is home to the supermassive black hole captured by planet Earth’s Event Horizon Telescope in the first ever image of a black hole. Giant of the Virgo galaxy cluster about 55 million light-years away, M87 is the large galaxy rendered in blue hues in this infrared image from the Spitzer Space telescope. Though M87 appears mostly featureless and cloud-like, the Spitzer image does record details of relativistic jets blasting from the galaxy’s central region. Shown in the inset at top right, the jets themselves span thousands of light-years. The brighter jet seen on the right is approaching and close to our line of sight. Opposite, the shock created by the otherwise unseen receding jet lights up a fainter arc of material. Inset at bottom right, the historic black hole image is shown in context, at the center of giant galaxy and relativistic jets. Completely unresolved in the Spitzer image, the supermassive black hole surrounded by infalling material is the source of the enormous energy driving the relativistic jets from the center of active galaxy M87.
Astronomy Picture of the Day 04/27/2019