L1527内的原星
(原标题: The Protostar within L1527)
2022-11-18
浏览次数: 14
这颗位于L1527黑云中的原恒星只有10万年的历史，它仍然被包裹在气体和尘埃云中，这些气体和尘埃云为它的成长提供了动力。在这张詹姆斯韦伯太空望远镜拍摄的NIRCam图像中，红外星云颈部的暗带是一个厚厚的圆盘，环绕着年轻的恒星物体。这个圆盘几乎是正面的，比我们的太阳系大一点，它最终为原恒星提供了物质，同时又把它隐藏在韦伯的直接红外视野之外。然而，星云本身的细节却令人惊叹。在原恒星发出的红外光照射下，沙漏状星云的空洞是在恒星形成过程中喷出的物质穿过周围介质而形成的。随着原恒星质量的增加，它最终会成为一颗成熟的恒星，坍缩并在其核心引发核聚变。这颗原恒星位于距离我们460光年远的金牛座恒星形成区，它很可能与我们早期的太阳和太阳系相似。韦伯的NIRCam图像跨度约为0.3光年。
查看原文解释
The protostar within dark cloud L1527 is a mere 100,000 years old, still embedded in the cloud of gas and dust that feeds its growth. In this NIRCam image from the James Webb Space Telescope, the dark band at the neck of the infrared nebula is a thick disk that surrounds the young stellar object. Viewed nearly edge-on and a little larger than our Solar System, the disk ultimately supplies material to the protostar while hiding it from Webb's direct infrared view. The nebula itself is seen in stunning detail though. Illuminated by infrared light from the protostar, the hourglass-shaped nebula's cavities are created as material ejected in the star-forming process plows through the surrounding medium. As the protostar gains mass it will eventually become a full-fledged star, collapsing and igniting nuclear fusion in its core. A likely analog to our own Sun and Solar System in their early infancy, the protostar within dark cloud L1527 lies some 460 light-years distant in the Taurus star-forming region. Webb's NIRCam image spans about 0.3 light-years.