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Li, Qiang; Zhou, Jianjun; Esimbek, Jarken; He, Yuxin; Baan, W. A.; Li, Dalei; Wu, Gang; Tang, Xindi; Ji, Weiguang; Zhexeray, Dauren
The Astrophysical journal, 11/2018, Letnik: 867, Številka: 2Journal Article
An unbiased search of molecular outflows within the region of the CO High Resolution survey has identified 157 high-mass outflows from a sample of 770 APEX Telescope Large Area Survey of the Galaxy clumps with a detection rate of 20%. The detection rate of outflows increases for clumps with higher Mclump, Lbol, Lbol/Mclump, N H 2 , and Tdust compared to the clumps with no outflow. The detection rates of the outflow increase from protostellar (8%) to young stellar object clump (17%) to massive star-forming clump (29%). The detection rate 26% for quiescent clump is preliminary, because the sample of quiescent clumps is small. A statistical relation between the outflow and clump masses for our sample is log ( M out M ) = ( − 1.1 0.21 ) + ( 0.9 0.07 ) log ( M clump M ) . The detection rate of outflows and the outflow mass-loss rate show an increase with increasing Mclump, Lbol, N H 2 , and Tdust, which indicates that clumps with outflow with higher parameter values are at a more advanced evolutionary stage. The outflow mechanical force increases with increasing bolometric luminosities. No clear evidence has yet been found that higher-mass outflows have different launching conditions than low-mass outflows.
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