학술논문
ATOMS:ALMA Three-millimeter Observations of Massive Star-forming regions -- III :Catalogues of candidate hot molecular cores and Hyper/Ultra compact HII regions
Document Type
Working Paper
Author
Liu, Hong-Li; Liu, Tie; Evans, Neal J.; Wang, Ke; Garay, Guido; Qin, Sheng-Li; Li, Shanghuo; Stutz, Amelia; Goldsmith, Paul F.; Liu, Sheng-Yuan; Tej, Anandmayee; Zhang, Qizhou; Juvela, Mika; Li, Di; Wang, Jun-Zhi; Bronfman, Leonardo; Ren, Zhiyuan; Wu, Yue-Fang; Kim, Kee-Tae; Lee, Chang-Won; Tatematsu, Kenichi; Cunningham, Maria. R.; Liu, Xun-Chuan; Wu, Jing-Wen; Hirota, Tomoya; Lee, Jeong-Eun; Li, Pak-Shing; Kang, Sung-Ju; Mardones, Diego; Ristorcelli, Isabelle; Zhang, Yong; Luo, Qiu-Yi; Toth, L. Viktor; Yi, Hee-weon; Yun, Hyeong-Sik; Peng, Ya-Ping; Li, Juan; Zhu, Feng-Yao; Shen, Zhi-Qiang; Baug, Tapas; Dewangan, Lokesh; Chakali, Eswaraiah; Liu, Rong; Xu, Feng-Wei; Wang, Yu; Zhang, Chao; Li, Jinzeng; Zhou, Jianwen; Tang, Mengyao; Xue, Qiaowei; Issac, Namitha; Soam, Archana; Alvarez-Gutierrez, Rodrigo H.
Source
Subject
Language
Abstract
We have identified 453 compact dense cores in 3 mm continuum emission maps in the ATOMS (ALMA Three-millimeter Observations of Massive Star-forming regions) survey, and compiled three catalogues of high-mass star forming cores. One catalogue, referred to as H/UC-HII catalogue, includes 89 cores that enshroud hyper/ultra compact (H/UC) HII regions as characterized by associated compact H40alpha emission. A second catalogue, referred to as pure s-cHMC, includes 32 candidate Hot Molecular Cores (HMCs) showing rich spectra (N>20lines) of complex organic molecules (COMs) but not associated with H/UC-HII regions. The third catalogue, referred to as pure w-cHMC, includes 58 candidate HMCs with relatively low levels of COM richness and not associated with H/UC-HII regions. These three catalogues of dense cores provide an important foundation for future studies of the early stages of high-mass star formation across the Milky Way. We also find that nearly half of H/UC-HII cores are candidate HMCs. From the number counts of COM-containing and H/UC-HII cores, we suggest that the duration of high-mass protostellar cores showing chemically rich features is at least comparable to the lifetime of H/UC-HII regions. For cores in the H/UC-HII catalogue, the width of the H40alpha line increases as the core size decreases, suggesting that the non-thermal dynamical and/or pressure line-broadening mechanisms dominate on the smaller scales of the H/UC-HII cores.
Comment: 17 pages, five tables, and 11 figures. Accepted for publication at MNRAS
Comment: 17 pages, five tables, and 11 figures. Accepted for publication at MNRAS