仙女座星系KX的双极喷流
(原标题: The Bipolar Jets of KX Andromedae)
2025-12-05
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从仙女座变星KX向外喷射，这些令人惊叹的双极喷流长达19光年。最近发现，在这张以KX和为中心的深度望远镜图像中，它们以前所未有的细节显示出来，这张图像是由692小时的综合图像数据组成的。事实上，从光谱上看，KX和是一个相互作用的双星系统，由一颗明亮、炽热的b型恒星和一颗膨胀的冷巨星组成，这颗巨星是它的共同轨道、密切的伴侣。来自冷巨星的恒星物质很可能通过吸积盘转移到热b型恒星，壮观的对称喷流向外垂直于吸积盘本身。已知到KX和2500光年的距离，喷流的角度大小，以及吸积盘的估计倾角，导致每个喷流的大小估计为惊人的19光年。凤凰城免费APOD讲座：12月10日（周三）晚7点
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Blasting outward from variable star KX Andromedae, these stunning bipolar jets are 19 light-years long. Recently discovered, they are revealed in unprecedented detail in this deep telescopic image centered on KX And and composed from over 692 hours of combined image data. In fact, KX And is spectroscopically found to be an interacting binary star system consisting of a bright, hot B-type star with a swollen cool giant star as its co-orbiting, close companion. The stellar material from the cool giant star is likely being transferred to the hot B-type star through an accretion disk, with spectacular symmetric jets driven outward perpendicular to the disk itself. The known distance to KX And of 2,500 light-years, angular size of the jets, and estimated inclination of the accretion disk lead to the size estimate for each jet of an astonishing 19 light-years. Free APOD Lecture in Phoenix: Wednesday, December 10 at 7 pm
© Tim Schaeffer