Maps of the cold neutral medium at high Galactic latitude

Maps of the cold neutral medium (CNM) fraction (f_CNM) and the correction to the optically-thin HI column density for HI optical depth (R_HI) generated by the convolutional neural network from Murray et al. 2021 using all-sky 21cm emission survey data from the HI4Pi survey, and presented in Hensley, Murray & Dodici 2021. Maps of the parameters and their uncertainties (*err.fits) are provided in HEALPix format, with Nside=1024.

本数据集包含冷中性介质（cold neutral medium, CNM）占比（f_CNM）分布图，以及针对氢原子（HI）光学深度的光学薄氢原子柱密度校正因子（R_HI）分布图；上述图像由默里等人（Murray et al. 2021）基于HI4Pi巡天的全天21厘米射电发射巡天数据，通过卷积神经网络（convolutional neural network）生成，相关研究成果发表于亨斯利、默里与多迪西（Hensley, Murray & Dodici 2021）的论文中。数据集同时提供各参数及其不确定性的分布图（对应*err.fits文件），采用HEALPix格式存储，其Nside参数取值为1024。