HII regions found with LAMOST spectra

HII regions are emission nebulae created when young and massive stars ionize nearby gas clouds with high-energy ultraviolet radiation. Having more HII region samples will help us understand the formation and evolution of stars.

Machine-learning methods are often applied to search for special celestial bodies such as H II regions. LAMOST has conducted spectral surveys and provided a wealth of valuable spectra for the research of special and rare celestial bodies. To overcome the problem of sparse positive samples and diversification of negative samples, a novel method called the self-calibrated convolution network is introduced and implemented for spectral processing.