A<i>位</i>3 mm and 1 mm line survey toward the yellow hypergiant IRC +10420
A<i>位</i>3 mm and 1 mm line survey toward the yellow hypergiant 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 prototypical yellow hypergiant star, IRC +10420. For this purpose, we obtained full line surveys at 1 and 3 mm atmospheric windows.