论文标题
基于Sun-As-A-Star光谱和磁盘分辨活性指标的色球活性表征
Characterization of chromospheric activity based on Sun-as-a-star spectral and disk-resolved activity indices
论文作者
论文摘要
强的色球吸收系CA H＆K紧密连接到恒星表面磁场。仅对于太阳，光谱活动指数才能与太阳能磁盘上不断发展的磁性特征有关。太阳能磁盘集成（SDI）望远镜在大型双筒望远镜（LBT）的Potsdam eChelle polarimetric和光谱仪器（PEPSI）中供应Graham Mt. Interigant Vistoration（Mgio），美国亚利桑那州的Graham Mt.得出CA H＆K发射率，即S索引。此外，我们根据Observatorio del Teide，Tenerife，Spain，Spain和Full-Disk Ultraviolet（UV）1600〜的大气成像组件（AIA）图像（AIA）在Solar Dynamilics Observatory（Sdo）上的图像（SDO）上（SDO）上的图像（aipervorate obsodication（a obsovator）（so），我们还基于Observatorio del Teide，Tenerife，Tenerife，Spain，Spain和Full-Disk Ultraviolet（UV）1600〜Å大气成像组件（AIA）在Solar Dynamilics Observatory（Sdo）上的图像。因此，Sun-As-A-Star光谱指数与它们的对应物有关，这些谱图来自太阳能球的分辨图像。即使在最小太阳周期的最低磁性活动中，所有指标都显示旋转调制的特征。将不同类型的活动指数汇总在一起的潜力有可能连接不同的色球层数据集，从而在许多太阳能循环中对色圈活性进行了全面描述。
The strong chromospheric absorption lines Ca H & K are tightly connected to stellar surface magnetic fields. Only for the Sun, spectral activity indices can be related to evolving magnetic features on the solar disk. The Solar Disk-Integrated (SDI) telescope feeds the Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) of the Large Binocular Telescope (LBT) at Mt. Graham International Observatory (MGIO), Arizona, U.S.A. We present high-resolution, high-fidelity spectra that were recorded on 184 & 82 days in 2018 & 2019 and derive the Ca H & K emission ratio, i.e., the S-index. In addition, we compile excess brightness and area indices based on full-disk Ca K line-core filtergrams of the Chromospheric Telescope (ChroTel) at Observatorio del Teide, Tenerife, Spain and full-disk ultraviolet (UV) 1600~Å images of the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO). Thus, Sun-as-a-star spectral indices are related to their counterparts derived from resolved images of the solar chromosphere. All indices display signatures of rotational modulation, even during the very low magnetic activity in the minimum of Solar Cycle 24. Bringing together different types of activity indices has the potential to join disparate chromospheric datasets, yielding a comprehensive description of chromospheric activity across many solar cycles.
