论文标题
Herschel Spire傅立叶变换光谱仪光谱特征Finder V. NGC 891的旋转测量值
The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder V. Rotational measurements of NGC 891
论文作者
论文摘要
ESA Herschel光谱和光度成像接收器（SPIRE）傅立叶变换光谱仪（FTS）光谱特征发现器（FF）项目是在Spire仪器团队内开发的自动光谱特征拟合程序，可从所有公开可用的Spire FTS观测值中提取所有突出的光谱特征。在这项工作中，我们证明了从边缘螺旋星系NGC 891的三个观察结果中提取的FF信息的使用来测量在远红外频率上的NII和CI气体的旋转，以补充与HI 21CM线路的无线电观察结果，以及CO（1-0）过渡以及Halpha的光学测量。我们发现，NII和CI气体的测量值均遵循与HI和HALPHA相似的速度，并且在NGC 891的磁盘中，星际介质（ISM）的中性区域和电离区域之间的相关性相似。
The ESA Herschel Spectral and Photometric Imaging Receiver (SPIRE) Fourier Transform Spectrometer (FTS) Spectral Feature Finder (FF) project is an automated spectral feature fitting routine developed within the SPIRE instrument team to extract all prominent spectral features from all publicly available SPIRE FTS observations. In this work, we demonstrate the use of the FF information extracted from three observations of the edge-on spiral galaxy NGC 891 to measure the rotation of NII and CI gas at Far-infrared frequencies in complement to radio observations of the HI 21cm line and the CO(1-0) transition as well as optical measurements of Halpha. We find that measurements of both NII and CI gas follow a similar velocity profile to that of HI and Halpha showing a correlation between neutral and ionized regions of the interstellar medium (ISM) in the disk of NGC 891.
