NGC 281：无星无星
(原标题: NGC 281: Starless with Stars)
2021-11-19
浏览次数: 77
在可见光下，这些恒星已经从NGC 281的窄带图像中移除了，NGC 281是一个恒星形成区域，距离仙后座大约1万光年。不过，通过数字技术将星星添加到最终的无星图像中。但是这些恒星没有使用可见光图像数据，而是添加了钱德拉x射线天文台的x射线数据（紫色）和斯皮策太空望远镜的红外数据（红色）。合并的多波长视图显示了该地区嵌入星团IC 1590中的众多恒星。这些年轻的恒星通常被星云的气体和模糊的尘埃隐藏在可见光图像中。NGC 281的直径约为80光年，在可见光下的整体外观也被后院天文成象者称为吃豆星云。
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In visible light the stars have been removed from this narrow-band image of NGC 281, a star forming region some 10,000 light-years away toward the constellation Cassiopeia. Stars were digitally added back to the resulting starless image though. But instead of using visible light image data, the stars were added with X-ray data (in purple) from the Chandra X-ray Observatory and infrared data (in red) from the Spitzer Space Telescope. The merged multiwavelength view reveals a multitude of stars in the region's embedded star cluster IC 1590. The young stars are normally hidden in visible light images by the natal cloud's gas and obscuring dust. Also known to backyard astro-imagers as the Pacman Nebula for its overall appearance in visible light, NGC 281 is about 80 light-years across.
© Wido Oerlemans