LOCNES：研究近红外恒星活动的太阳望远镜
LOCNES: a solar telescope to study stellar activity in the near infrared
摘要：
LOCNES（低成本近红外扩展太阳望远镜）是安装在TNG（Telescopio Nazionale Galileo）的太阳望远镜。它通过一个40米长的光纤将太阳光输入近红外光谱仪GIANO-B。LOCNES的设计目的是获得太阳作为恒星时的高信噪比光谱，并通过分子带单元进行精确的波长校准。这是一个全新的研究领域，将提供及时的结果，以改善使用iSHELL，CARMENES和GIANO-B等近红外光谱仪搜索地球行星的工作。我们将提取几个磁盘集成的活动指标和平均磁场测量太阳的近红外光谱。最终，它们将与太阳作为恒星的RV以及可见光和近红外太阳圆盘的解析图像相关联。这种方法将允许更好地了解活动引起的RV变化的起源在两个频谱域，并将有助于改善其校正技术。在本文中，我们概述了LOCNES项目的科学驱动程序及其首次调试结果。
英文摘要：
LOCNES (LOw-Cost NIR Extended Solar telescope) is a solar telescope installed at the TNG (Telescopio Nazionale Galileo). It feeds the light of the Sun into the NIR spectrograph GIANO-B through a 40-m patch of optical fibers. LOCNES has been designed to obtain high signal-to-noise ratio spectra of the Sun as a star with an accurate wavelength calibration through molecular-band cells. This is an entirely new area of investigation that will provide timely results to improve the search of telluric planets with NIR spectrographs such as iSHELL, CARMENES, and GIANO-B. We will extract several disc-integrated activity indicators and average magnetic field measurements for the Sun in the NIR. Eventually, they will be correlated with both the RV of the Sun-as-a -star and the resolved images of the solar disc in visible and NIR. Such an approach will allow for a better understanding of the origin of activity-induced RV variations in the two spectral domains and will help in improving the techniques for their corrections. In this paper, we outline the science drivers for the LOCNES project and its first commissioning results.
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