Kee-Tae Kim, Tomoya Hirota, Koichiro Sugiyama, Jungha Kim, Do-Young Byun, James Chibueze, Kazuya Hachisuka, Bo Hu, Eodam Hwang, Ji-Hyun Kang, Jeong-Sook Kim, Mikyoung Kim, Tie Liu, Naoko Matsumoto et al.
Abstract:Despite their importance in the formation and evolution of stellar clusters and galaxies, the formation of high-mass stars remains poorly understood. We recently started a systematic observational study of the 22 GHz water and 44 GHz class I methanol masers in high-mass star-forming regions as a four-year KaVA large program. Our sample consists of 87 high-mass young stellar objects (HM-YSOs) in various evolutionary phases, many of which are associated with two or more different maser species. The primary scien…
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