HD 163296：恒星形成时的喷流
(原标题: HD 163296: Jet from a Star in Formation)
2021-06-22
浏览次数: 36
在恒星形成过程中，喷流是如何产生的？没有人能确定，尽管最近HD 163296年轻恒星系统的图像很有启发性。这张特色图像中的中央恒星仍在形成，但已经被旋转的圆盘和向外移动的喷流包围。这个圆盘是由智利阿塔卡马大型毫米波阵列（ALMA）拍摄的无线电波显示出来的，并且显示出可能是由非常年轻的行星的引力造成的间隙。由同样位于智利的甚大望远镜（VLT）拍摄的可见光显示的喷流，从圆盘中心喷出快速移动的气体——主要是氢气。该系统的跨度是地日距离（au）的数百倍。这些新观测的细节正在被解释，以支持这样的猜测，即喷流至少部分是由旋转圆盘中的磁场产生和形成的。未来对HD 163296和其他类似恒星形成系统的观测可能有助于填补细节。天体物理学家：在天体物理学源代码库中浏览2500多个代码
查看原文解释
How are jets created during star formation? No one is sure, although recent images of the young star system HD 163296 are quite illuminating. The central star in the featured image is still forming but seen already surrounded by a rotating disk and an outward moving jet. The disk is shown in radio waves taken by the Atacama Large Millimeter Array (ALMA) in Chile, and show gaps likely created by the gravity of very-young planets. The jet, shown in visible light taken by the Very Large Telescope (VLT, also in Chile), expels fast-moving gas -- mostly hydrogen -- from the disk center. The system spans hundreds of times the Earth-Sun distance (au). Details of these new observations are being interpreted to bolster conjectures that the jets are generated and shaped, at least in part, by magnetic fields in the rotating disk. Future observations of HD 163296 and other similar star-forming systems may help fill in details. Astrophysicists: Browse 2,500+ codes in the Astrophysics Source Code Library