Imaging nearby, habitable-zone planets with the Large Binocular Telescope Interferometer

Imaging nearby, habitable-zone planets with the Large Binocular Telescope Interferometer
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使用大型双目望远镜干涉仪对附近的宜居带行星进行成像

DOI:
10.1117/12.2635333
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发表时间:
2022
期刊:
SPIE
影响因子:
--
通讯作者:
Kasper, Markus
Kasper, Markus
中科院分区:
--
文献类型:
--
作者:
Ertel, Steve;Wagner, Kevin;Leisenring, Jarron;Apai, Dániel;Defrère, Denis;Dietrich, Jeremy;Eisner, Joshua A.;Faramaz, Virginie;Hoffmann, William;Kasper, Markus

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大型双筒望远镜的主要设计考虑因素之一是在10μm左右的中红外波长分辨最近恒星的宜居区。大型双筒望远镜干涉仪利用望远镜上安装的两个8.4米的反射镜和22.7米的边到边分离来在热红外波长上进行灵敏的、高角度分辨率的观测。除了分别使用两个反射镜的自适应光学成像外,该仪器还可以利用LBT的全部分辨率进行归零和菲佐成像干涉测量。LBTI团队已经成功地完成了寻找陆地行星系统(宿主)的可观测特征的工作,为此,我们使用了零位干涉测量来搜索外生生物尘埃,我们正在继续对检测到的系统进行表征。在这里,我们描述了一个新的计划,该计划利用LBTI的Fizeau成像干涉测量能力,对围绕着一小部分特别合适的附近恒星的低质量HZ行星进行深度成像搜索。我们还审查了LBTI与拟议项目相关的当前状态,以证明该工具已为如此大型的项目做好了准备。
One of the main design considerations of the Large Binocular Telescope (LBT) was the goal to resolve the habitable zones (HZs) of the nearest stars at mid-infrared wavelengths around 10 μm. The LBT Interferometer (LBTI) makes use of the telescope’s two 8.4m mirrors on a common mount and their 22.7m edge-to-edge separation for sensitive, high-angular resolution observations at thermal-infrared wavelengths. In addition to adaptive optics imaging using the two mirrors separately, the instrument enables nulling and Fizeau imaging interferometry exploiting the full resolving power of the LBT. The LBTI team has successfully completed the Hunt for Observable Signatures of Terrestrial planetary Systems (HOSTS), for which we used nulling-interferometry to search for exozodiacal dust, and we are continuing the characterization of the detected systems. Here, we describe a new program to exploit the LBTI’s Fizeau imaging interferometric capabilities for a deep imaging search for low-mass, HZ planets around a small sample of particularly suitable, nearby stars. We also review the LBTI’s current status relevant to the proposed project to demonstrate the instrument is ready for such a large project.
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