Parthasarathy, M; Jasniewicz, G; Thevenin, F
(Springer, 2019-01)
HD 179821 is classified as G5 Ia star. From the IRAS colors and spectral energy distributions it was classified as a post-AGB star. But some studies classify it as a massive (30 to 19 M⊙) post-red supergiant evolving to ...