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首页> 外文会议>Conference on space telescopes and instrumentation >High Contrast Imaging in Multi-Star Systems: Technology Development and First Lab Results
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High Contrast Imaging in Multi-Star Systems: Technology Development and First Lab Results

机译：多星系统中的高对比度成像：技术开发和首个实验室结果

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We show preliminary laboratory results advancing the technology readiness of a method to directly image planets and disks in multi-star systems such as Alpha Centauri. This method works with almost any coronagraph (or external occulter with a DM) and requires little or no change to existing and mature hardware. Because of the ubiquity of multistar systems, this method potentially multiplies the science yield of many missions and concepts such as WFIRST, Exo-C/S, HabEx, LUVOIR, and potentially enables the detection of Earth-like planets (if they exist) around our nearest neighbor star, Alpha Centauri, with a small and low-cost space telescope such as ACESat. We identified two main challenges associated with double-star (or multi-star) systems and methods to solve them. "Multi-Star Wavefront Control" (MS WC) enables the independent suppression of starlight from more than one star, and Super-Nyquist Wavefront Control (SNWC) enables extending MSWC to the case where star separation is beyond the Nyquist limit of the deformable mirror (DM). Our lab demonstrations were conducted at the Ames Coronagraph Experiment (ACE) laboratory and proved the basic principles of both MSWC and SNWC. They involved a 32x32 deformable mirror but no coronagraph for simplicity. We used MSWC to suppress starlight independently from two stars by at least an order of magnitude, in monochromatic as well as broadband light as broad as 50%. We also used SNWC to suppress starlight at 32 1/D, surpassing the Nyquist limit of the DM.
机译：我们显示了初步的实验室结果，这些技术进步了直接对诸如Alpha Centauri之类的多星系统中的行星和磁盘进行成像的方法的技术准备。这种方法几乎适用于所有日冕仪（或带有DM的外部掩星），并且对现有和成熟的硬件几乎不需要更改。由于存在多星系统，因此该方法有可能使许多任务和概念（例如WFIRST，Exo-C / S，HabEx，LUVOIR）的科学产率成倍增加，并有可能检测周围的类地行星（如果存在）我们最近的邻居恒星Alpha Centauri，使用小型低成本的太空望远镜，如ACESat。我们确定了与双星（或多星）系统相关的两个主要挑战以及解决这些挑战的方法。 “多星波阵面控制”（MS WC）能够独立抑制多于一颗恒星的星光，而超级奈奎斯特波阵面控制（SNWC）可以将MSWC扩展到恒星分离超出变形镜的奈奎斯特极限的情况（DM）。我们的实验室演示是在Ames日冕仪实验（ACE）实验室进行的，证明了MSWC和SNWC的基本原理。他们使用了32x32变形镜，但为简单起见，没有使用日冕仪。我们使用MSWC来将星光独立于两颗星至少抑制一个数量级，在单色和宽带光中，其抑制范围高达50％。我们还使用SNWC将星光抑制为32 1 / D，超过了DM的奈奎斯特极限。

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