标题： 用晚型星测量弥漫星际带。 改进的线表来模拟背景恒星光谱 显示英文标题

标题： Measuring Diffuse Interstellar Bands with cool stars. An improved line list to model the background stellar spectra

摘要： 星际带（DIBs）在恒星光谱中普遍存在。传统上，由于它们平滑的连续谱，人们通过从热星中提取它们来研究这些特征。在一个有多个正在进行或计划中的使用多目标光谱仪的大规模银河系巡天的时代，冷星构成了一组吸引人的目标集。从技术角度来看，由于连续谱的复杂性，在它们的光谱中提取DIBs更具挑战性。在这次贡献中，我们将为社区提供一组改进的恒星线，在与强DIBs（分别位于l6196、l6269、l6284和l6379处）相关的光谱区域中。这些线将允许创建更好的恒星合成光谱，重现背景发射，并更准确地提取与特定DIB相关的大小值。太阳和大角星分别被用作矮星和巨星的代表性例子。每个都使用TURBOSPECTRUM和VALD恒星线列表建模出高质量的光谱。为了使太阳和大角星的残差最小化，具体线的振荡强度log(gf)和/或波长被修改以创建合成光谱。基于改进线表的合成光谱在所提到的光谱范围内更准确地再现了太阳和大角星的观测光谱。合成光谱与观测光谱之间的残差始终小于10%，比之前存在的选项好得多。新线表已经使用来自各种恒星（包括巨星和矮星）的一些特征光谱，并在不同程度的消光下进行了测试。正如太阳和大角星的情况一样，在用于提取DIB信息的拟合中，使用更新后的线表制作的合成光谱的残差更小。提供了带有更新参数的表格供社区使用。 显示英文摘要

摘要： DIBs are ubiquitous in stellar spectra. Traditionally, they have been studied through their extraction from hot stars, because of their smooth continuum. In an era where there are several going-on or planned massive Galactic surveys using multi-object spectrographs, cool stars constitute an appealing set of targets. From the technical point of view, the extraction of DIBs in their spectra is more challenging due to the complexity of the continuum. In this contribution we will provide the community with an improved set of stellar lines in the spectral regions associated to the strong DIBs at l6196, l6269, l6284, and l6379. These lines will allow for the creation of better stellar synthetic spectra, reproducing the background emission and a more accurate extraction of the magnitudes associated with a given DIB. The Sun and Arcturus were used as representative examples of dwarf and giant stars, respectively. A high quality spectrum for each of them was modeled using TURBOSPECTRUM and the VALD stellar line list. The oscillator strength log(gf) and/or wavelength of specific lines were modified to create synthetic spectra where the residuals in both the Sun and Arcturus were minimized. The synthetic spectra based on the improved line lists reproduce the observed spectra for the Sun and Arcturus in the mentioned spectral ranges with greater accuracy. Residuals between the synthetic and observed spectra are always <10%, much better than with previously existing options. The new line list has been tested with some characteristic spectra, from a variety of stars, including both giant and dwarf stars, and under different degrees of extinction. As it happened with the Sun and Arcturus residuals in the fits used to extract the DIB information are smaller when using synthetic spectra made with the updated line lists. Tables with the updated parameters are provided to the community.