3mm and 1mm spectra of IRC +10420

Our knowledge of the chemical properties of the circumstellar ejecta of the most massive evolved stars is particularly poor. We aim to study the chemical characteristics of the...我们对大质量演化恒星的星周抛射物（circumstellar ejecta）的化学性质的认知尤为匮乏。本研究旨在探究……的化学特征。