To date, few studies have focused on protostellar outflow feedback at scales larger than several parsecs. To address this paucity of research, we investigate the effects of feedback from CO outflow candidates on their parent clouds over ∼110 deg² toward the W3/4/5 complex and its surroundings. Our search identified 265 ¹³CO clouds with radii being ∼0.04–17.12 pc. We estimate the turbulent support and potential disruptive effect of the outflow activities through analyzing physical properties of outflow candidates and their host clouds in terms of turbulence and gravitational binding energy. We find that (1) clouds of larger size might be less affected by feedback; (2) the possible scale break is ≳4.7 pc for both turbulent support and potential disruptive effect; (3) if outflows couple to dense gas where stars are forming, for clouds in the Perseus arm, a scale ≲0.2–0.4 pc is sufficient for the energy and momentum injected by outflow activity to maintain turbulence, while for clouds in the Local arm, the scale is ≲0.1–0.2 pc; and (4) for clouds in the Perseus arm, a scale ≲0.3–1.0 pc is needed for outflow activity to potentially disperse material away from the natal clouds, while for clouds in the Local arm, the scale is ≲0.2–0.6 pc. The strength of outflow activity may affect the values in points 3 and 4. Finally, we find that outflow feedback probably possesses the power to alter the line width–size relation.

迄今为止，很少有研究关注原星外流反馈，其尺度大于几秒差距。为了解决这一稀疏的研究，我们研究了CO流出候选物在110度^2范围内向W3 / 4/5复合体及其周围环境的母云反馈的影响。我们的搜索确定了265 ¹³半径为0.04–17.12 pc的CO云。我们通过分析湍流和引力结合能方面的流出候选物及其宿主云的物理特性，估算流出活动的湍流支持和潜在破坏作用。我们发现（1）较大尺寸的云可能较少受到反馈的影响；（2）湍流支撑和潜在破坏作用的可能的水垢折断为≳4.7pc；（3）如果流出物与正在形成恒星的致密气体耦合，则对于英仙座臂中的云，≲0.2-0.4 pc的比例足以使流出活动注入的能量和动量保持湍流，而对于本地臂中的云则，比例为≲0.1–0.2 pc；（4）对于英仙臂中的云，尺度≲0.3–1。需要0 pc的流出活动才能将物质从新生云中分散开，而对于本地分支中的云，比例为≲0.2–0.6 pc。流出活动的强度可能会影响点3和点4的值。最后，我们发现流出反馈可能具有改变线宽与尺寸关系的能力。