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arXiv 2009.09014astro-ph.GAastro-ph.IM
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Herschel SPIRE傅里叶变换光谱仪的光谱特性研究Ⅴ. NGC 891的转动测量

The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder V. Rotational measurements of NGC 891

Chris S. Benson, L. D. Spencer, I. Valtchanov, J. Scott, N. Hładczuk

摘要:

欧空局赫歇尔光谱和光度成像接收器(SPIRE)傅里叶变换光谱仪(FTS)光谱特征拟合(FF)项目是SPIRE仪器团队内部开发的自动光谱特征拟合例程,用于从所有公开的SPIRE FTS观测中提取所有突出的光谱特征。在这项工作中,我们演示了使用的FF信息提取的三个观测的边缘上的螺旋星系NGC 891测量旋转的NII和CI气体在远红外频率补充无线电观测的HI 21厘米线和CO(1-0)的过渡,以及光学测量的H α。我们发现,测量的NII和CI气体遵循类似的速度剖面HI和Halpha显示中性和电离区域之间的相关性的星际介质(ISM)在NGC 891的磁盘。

英文摘要:

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.

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