对VdB 31的反思
(原标题: Reflections on VdB 31)
2025-02-13
浏览次数: 89
在御夫座的高处，美丽的蓝色VdB 31是Sidney van den Bergh 1966年的反射星云目录中的第31个天体。它与爱德华·e·巴纳德在1919年的天空黑暗标记目录中记录的黑暗、模糊的云B26、B27和B28分享了这幅构图良好的天体静物。这些星云都是星际尘埃云。巴纳德暗星云阻挡了背景恒星发出的光。对于VdB 31，尘埃优先反射嵌入的热变星御夫座AB发出的蓝色星光。用哈勃太空望远镜探索猎户座AB的周围，发现这颗几百万年的年轻恒星本身被一个扁平的尘埃盘包围着，这表明一个行星系统正在形成。御夫座AB距离我们大约470光年。在这个距离下，这张宇宙画布的跨度约为8光年。
查看原文解释
Riding high in the constellation of Auriga, beautiful, blue VdB 31 is the 31st object in Sidney van den Bergh's 1966 catalog of reflection nebulae. It shares this well-composed celestial still life with dark, obscuring clouds B26, B27, and B28, recorded in Edward E. Barnard's 1919 catalog of dark markings in the sky. All are these nebulae are interstellar dust clouds. Barnard's dark nebulae block the light from background stars. For VdB 31 the dust preferentially reflects bluish starlight from embedded, hot, variable star AB Aurigae. Exploring the environs of AB Aurigae with the Hubble Space Telescope has revealed the several million year young star is itself surrounded by a flattened dusty disk with evidence for the ongoing formation of a planetary system. AB Aurigae is about 470 light-years away. At that distance this cosmic canvas would span about eight light-years.
© Roberto Marinoni