年轻的恒星喷射机MHO 2147
(原标题: Young Star Jet MHO 2147)
2022-01-21
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激光引导恒星和自适应光学使这张令人惊叹的恒星喷流的地面图像变得更加清晰，这张图像来自智利安第斯山脉的双子座南天文台，以及地球。MHO 2147的双喷流来自一颗处于形成阶段的年轻恒星。它位于银河系中心和人马座和蛇夫座的交界处，估计距离约为1万光年。在中心，恒星本身被一层致密的冷尘埃所遮蔽。但红外图像仍然追踪到弯曲的喷流在一个框架内，按照系统的估计距离，这个框架将跨越大约5光年。在年轻的旋转恒星的推动下，喷流的明显的漂移方向很可能是由于岁差。作为多恒星系统的一部分，这颗年轻恒星的旋转轴在附近伴星的引力影响下会像陀螺一样缓慢进动或摆动。
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Laser guide stars and adaptive optics sharpened this stunning ground-based image of stellar jets from the Gemini South Observatory, Chilean Andes, planet Earth. These twin outflows of MHO 2147 are from a young star in formation. It lies toward the central Milky Way and the boundary of the constellations Sagittarius and Ophiuchus at an estimated distance of some 10,000 light-years. At center, the star itself is obscured by a dense region of cold dust. But the infrared image still traces the sinuous jets across a frame that would span about 5 light-years at the system's estimated distance. Driven outward by the young rotating star, the apparent wandering direction of the jets is likely due to precession. Part of a multiple star system, the young star's rotational axis would slowly precess or wobble like a top under the gravitation influence of its nearby companions.