论文标题
在精确的径向速度中表征和缓解尿液吸收II：M2型星的研究
Characterizing and Mitigating Telluric Absorption in Precise Radial Velocities II: A Study of an M2 Type Star
论文作者
论文摘要
牙髓吸收线会影响地面高分辨率光谱仪的精确径向速度（RV）。在本文中，我们模拟了这种影响对恒星光谱类型的依赖性，并将研究G型星的第一篇论文的作品扩展到合成的M矮星。我们量化了一组模拟观测值中的牙写学中存在的可见和近红外（NIR）中精确的RV测量值的偏差。我们发现，与G型恒星相比，M矮人的RV受到了滴滴的影响。具体而言，对于M矮星恒星，纹理可以在红色光学中诱导高达16 cm/s的RV误差，而NIR中的RV误差超过220 cm/s。对于G矮人，可比的RV系统为3 cm/s，在NIR中为240 cm/s。我们将M Dwarfs恒星的相对增加归因于牙龈线和恒星多普勒信息含量之间波长的一致性增加。我们将模拟的结果与从NASA红外望远镜设施（IRTF）的Ishell光谱仪上收集的数据进行了比较。这项研究是作为NASA探针任务概念研究地球探针的后续行动。
Telluric absorption lines impact measuring precise radial velocities (RVs) from ground-based, high-resolution spectrographs. In this paper, we simulate the dependence of this impact on stellar spectral type and extend the work of the first paper in this series, which studied a G type star, to a synthetic M dwarf star. We quantify the bias in precise RV measurements in the visible and near-infrared (NIR) from the presence of tellurics in a simulated set of observations. We find that M dwarf RVs are more impacted by tellurics compared to G type stars. Specifically, for an M dwarf star, tellurics can induce RV errors of up to 16 cm/s in the red-optical and in excess of 220 cm/s in the NIR. For a G dwarf, comparable RV systematics are 3 cm/s in the red optical and 240 cm/s in the NIR. We attribute this relative increase for M dwarfs stars to the increased concordance in wavelength between telluric lines and stellar Doppler information content. We compare the results of our simulation to data collected on Barnard's star from the iSHELL spectrograph at the NASA Infrared Telescope Facility (IRTF). This study was conducted as a follow-up to the NASA probe mission concept study EarthFinder.
