Interférométrie的图像。瞳孔重排
Imagerie des étoiles évoluées par interférométrie. Réarrangement de pupille
摘要：
大气湍流是天文学高角分辨率的重要限制。干涉测量通过用单模光纤过滤入射光解决了这个问题。多亏了这种技术，我们用IOTA干涉仪获得了七颗演化恒星空间频率的非常精确的测量结果。根据这些测量结果，我们进行了盲解卷积，以恢复恒星表面的图像。其中六个，参宿四，Mu Cep，R Leo，Mira，Chi Cyg和CH Cyg，具有非常不对称的亮度分布。另一方面，大角星的数据与一个简单的边缘变暗的光球盘非常吻合。从观测的$χ$天鹅座，我们表明，恒星是由一个分子壳包围进行弹道运动。我们建议使用相同的技术与单模光纤的空间滤波，以纠正在望远镜的瞳孔湍流的影响。因为瞳孔是冗余的，所以该技术确实需要瞳孔的重新映射。我们开发了一种专用的算法，以证明在望远镜的衍射极限下重建图像是可能的，没有任何斑点噪声。我们的模拟表明，在8米望远镜上可以在可见光范围内获得高动态范围（超过10^6）。一个实验室实验正在建设中，以验证这一新仪器的概念。
英文摘要：
Atmospheric turbulence is an important limit to high angular resolution in astronomy. Interferometry resolved this issue by filtering the incoming light with single-mode fibers. Thanks to this technique, we obtained with the IOTA interferometer very precise measurements of the spatial frequencies of seven evolved stars. From these measurements, we performed a blind deconvolution to restore an image of the surface of the stars. Six of the them, Betelgeuse, Mu Cep, R leo, Mira, Chi Cyg and CH Cyg, feature very asymmetrical brightness distributions. On the other hand, the Arcturus data are extremely well fitted with a simple limb-darkened photospheric disc. From the observations of $χ$ Cyg, we show that the star is surrounded by a molecular shell undergoing a ballistic motion. We propose to use the same technique of spatial filtering with single-mode fibers to correct for the effect of turbulence in the pupil of a telescope. Because the pupil is redundant, this technique does require a remapping of the pupil. We developed a dedicated algorithm to show that it was possible to reconstruct images at the diffraction limit of the telescope free of any speckle noise. Our simulations show that a high dynamic range (over 10^6) could be obtained in the visible on an 8 meter telescope. A lab experiment is under construction to validate the concept of this new instrument.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
