Mid-J CO Line Observations of Protostellar Outflows in the Orion Molecular Clouds

Ten protostellar outflows in the Orion molecular clouds were mapped $^{12}$CO/$^{13}$CO ${J=6\rightarrow5}$ and $^{12}$CO ${J=7\rightarrow6}$ lines. The maps of these mid-$J$ CO lines have an angular resolution about 10$''$ a typical field size 100$''$. Physical parameters derived, including mass transfer rates, kinetic luminosities, outflow forces. sample was expanded by re-analyzing archival data nearby low-luminosity protostars, to cover wide range bolometric luminosities. Outflow derived from other transitions compared. ($J_{\rm up} \approx 6$) low-$J$ \leq 3$) line wings trace essentially same component. By contrast, high-$J$ (up $J_{\rm 50$) line-emission luminosity shows little correlation with line, which suggests that they distinct components. low/mid-$J$ long-term behaviors while are sensitive short-term activities. correlations between properties presented, strengths increase envelope mass.