论文标题
检测和表征与涡流纤维无效的关闭系外行星
Detecting and characterizing close-in exoplanets with Vortex Fiber Nulling
论文作者
论文摘要
Vortex纤维nulling（VFN）是一种干涉方法，用于抑制星光检测并在光谱上表征系外行星。它依靠涡旋相口罩和单模光纤来拒绝星光，同时在$ \ \lyssim1λ/d $的分离中同时将多达20％的行星灯耦合，从而实现了大量RV和过渡性的行星的光谱表征，以及其他情况下，这些行星不可属于公约coronagraphs concountal coronagrs。 VFN在实验室以可见波长的形式进行了证明，在这里我们介绍了这些实验的最新结果。这包括$ 5 \ times10^{ - 4} $的多色nulls，以10％带宽光在790 nm左右。已经设计了一个升级的测试床，现在正在实验室中建造。我们还在此处介绍了该工作的状态更新。最后，我们提出了初步的K波段（2 $μ$ M）的纤维无效结果，红外面膜将在2021年将其用作Keck Planet Imager和Tarriciber仪器的VFN模式的一部分。
Vortex Fiber Nulling (VFN) is an interferometric method for suppressing starlight to detect and spectroscopically characterize exoplanets. It relies on a vortex phase mask and single-mode fiber to reject starlight while simultaneously coupling up to 20% of the planet light at separations of $\lesssim1λ/D$, thereby enabling spectroscopic characterization of a large population of RV and transit-detected planets, among others, that are inaccessible to conventional coronagraphs. VFN has been demonstrated in the lab at visible wavelengths and here we present the latest results of these experiments. This includes polychromatic nulls of $5\times10^{-4}$ in 10% bandwidth light centered around 790 nm. An upgraded testbed has been designed and is being built in the lab now; we also present a status update on that work here. Finally, we present preliminary K-band (2 $μ$m) fiber nulling results with the infrared mask that will be used on-sky as part of a VFN mode for the Keck Planet Imager and Characterizer Instrument in 2021.
