标题： 76 用萨姆6米望远镜对IRC+10216进行的斑点遮罩干涉测量：团块壳层结构的证据 显示英文标题

标题： 76 mas speckle-masking interferometry of IRC+10216 with the SAO 6m telescope: Evidence for a clumpy shell structure

摘要： 我们展示了碳星IRC+10216的首张K'-波段图像，分辨率为76 mas。 衍射极限图像通过使用斑点掩模双谱方法从6米望远镜的斑点数据中重建。 图像显示，IRC+10216的尘埃壳极其不均匀。 在中心恒星210 mas半径范围内，五个单独的云团首次被解析。 基于一致的理论模型，我们认为这些结构是由星际尘埃形成产生的。 壳层结构的碎片化很可能提供了不均匀质量损失过程的直接证据，这可能被解释为大尺度表面对流细胞（Schwarzschild 1975），这是红巨星的常见现象。 显示英文摘要

摘要： We present the first K'-band image of the carbon star IRC+10216 with 76 mas resolution. The diffraction-limited image was reconstructed from 6m telescope speckle data using the speckle masking bispectrum method. The image shows that the dust shell of IRC+10216 is extremely clumpy. Five individual clouds within a 210 mas radius of the central star have been resolved for the first time. On the basis of consistent theoretical models we argue that these structures are produced by circumstellar dust formation. The fragmentation of the shell structure gives most likely direct evidence for an inhomogeneous mass-loss process which may be interpreted in terms of large-scale surface convection-cells (Schwarzschild 1975) being a common phenomenon for red giants.