2018ApJ...867..167L -
Astrophys. J., 867, 167-167 (2018/November-2)
High-mass outflows identified from COHRS CO (3-2) Survey.
LI Q., ZHOU J., ESIMBEK J., HE Y., BAAN W.A., LI D., WU G., TANG X., JI W. and ZHEXERAY D.
Abstract (from CDS):
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, NH2_, 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(Mout/M☉)=(-1.1±0.21)+(0.9±0.07)log(Mclump/M☉). The detection rate of outflows and the outflow mass-loss rate show an increase with increasing Mclump, Lbol, NH2_, 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.
Abstract Copyright:
© 2018. The American Astronomical Society.
Journal keyword(s):
ISM: jets and outflows - ISM: molecules - stars: formation - stars: massive
VizieR on-line data:
<Available at CDS (J/ApJ/867/167): table1.dat table2.dat table3.dat>
Simbad objects:
772
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