GH $α$ FaS：用于WHT的Galaxy H α法布里-珀罗系统
GH $α$ FaS : Galaxy H-alpha Fabry-Perot System for the WHT
摘要：
GH $α$ FaS是一个新的法布里-珀罗系统，现在可在威廉赫歇尔望远镜。2007年7月，它第一次安装在拉帕尔马4.2米WHT的Nasmyth焦点上。使用现代技术，与R $\sim$ 15000的顺序的光谱分辨率，并与看到有限的空间分辨率，GH $α$ FaS将提供一个新的面貌H $α$发射气体在附近的宇宙中的4.8角分圆场。许多科学计划可以在4.2米级望远镜上完成，在世界级的法布里-珀罗扫描条件下。不仅星系，而且HII区、行星状星云、超新星遗迹和弥漫的星际介质都是可以迅速获得独特数据的对象。来自蒙特利尔天文物理实验室（LAE）、马赛天文物理实验室（LAM-OAMP）和加那利群岛天文研究所（IAC）的天文学家通过详细研究附近一些螺旋星系的动力学，为GH $α$ FaS揭幕。还开发了一套强大的最先进的工具，用于减少和分析用GH $α$ FaS获得的数据立方体。
英文摘要：
GH$α$FaS a new Fabry-Perot system, is now available at the William Herschel Telescope. It was mounted, for the first time, at the Nasmyth focus of the 4.2 meter WHT on La Palma in July 2007. Using modern technology, with a spectral resolution of the order R$\sim$15000, and with a seeing limited spatial resolution, GH$α$FaS will provide a new look at the H$α$ -emitting gas over a 4.8 arcminutes circular field in the nearby universe. Many science programs can be done on a 4.2 metre class telescope in world class seeing conditions with a scanning Fabry-Perot. Not only galaxies but HII regions, planetary nebulae, supernova remnants and the diffuse interstellar medium are subjects for which unique data can be aquired rapidly. Astronomers from the Laboratoire d'Astrophysique Expérimentale (LAE) in Montréal, the Laboratoire d'Astrophysique de Marseille (LAM-OAMP), and the Instituto de Astrofísica de Canarias (IAC), have inaugurated GH$α$FaS by studying in detail the dynamics of some nearby spiral galaxies. A robust set of state-of-the-arts tools for reducing and analyzing the data cubes obtained with GH$α$FaS has also been developed.
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