M16, the Eagle Nebula, is an outstanding \HII \ region which exhibits extensive high-mass star formation and hosts remarkable "pillars". We herein obtained new $^{12}$CO $J=$1-0 data for the region observed with NANTEN2, which were combined with the $^{12}$CO $J=$1-0 data obtained using FUGIN survey. These observations revealed that a giant molecular cloud (GMC) of $\sim 1.3 \times 10^5$ \Msun \ is associated with M16, which is elongated by over 30 pc and is perpendicular to the galactic plane, at a distance of 1.8 kpc. This GMC can be divided into the northern (N) cloud, the eastern (E) filament, the southeast (SE) cloud, the southeast (SE) filament, and the southern (S) cloud. We also found two velocity components (blue and red shifted component) in the N cloud. The blue-shifted component shows a ring-like structure, as well as the red-shifted component coincides with the intensity depression of the ring-like structure. The position-velocity diagram of the components showed a V-shaped velocity feature. The spatial and velocity structures of the cloud indicated that two different velocity components collided with each other at a relative velocity of 11.6 \kms. The timescale of the collision was estimated to be $\sim 4 \times 10^5$ yr. The collision event reasonably explains the formation of the O9V star ALS15348, as well as the shape of the Spitzer bubble N19. A similar velocity structure was found in the SE cloud, which is associated with the O7.5V star HD168504. In addition, the complementary distributions of the two velocity components found in the entire GMC suggested that the collision event occurred globally. On the basis of the above results, we herein propose a hypothesis that the collision between the two components occurred sequentially over the last several $10^{6}$ yr and triggered the formation of O-type stars in the NGC6611 cluster.

中文翻译：

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使用 Nobeyama 45 m 望远镜 (FUGIN) 进行森林无偏银河平面成像调查。八。云与云碰撞引发巨分子云 M 16（鹰星云）中大质量恒星形成的可能证据

M16，鹰状星云，是一个杰出的\HII\区域，展示了广泛的大质量恒星形成并拥有非凡的“支柱”。我们在此获得了 NANTEN2 观测到的区域的新 $^{12}$CO $J=$1-0 数据，并结合使用 FUGIN 调查获得的 $^{12}$CO $J=$1-0 数据。这些观察结果表明，一个巨大的分子云（GMC）$\sim 1.3 \times 10^5$ \Msun \ 与 M16 相关联，它被拉长了 30 pc 以上，并且垂直于银河平面，距离为 1.8石油公司。该 GMC 可分为北部 (N) 云、东部 (E) 细丝、东南 (SE) 云、东南 (SE) 细丝和南部 (S) 云。我们还在 N 云中发现了两个速度分量（蓝移和红移）。蓝移成分呈现环状结构，以及红移分量与环状结构的强度降低相吻合。组件的位置-速度图显示出 V 形速度特征。云的空间和速度结构表明，两个不同的速度分量以 11.6 公里的相对速度相互碰撞。碰撞的时间尺度估计为 $\sim 4 \times 10^5$ yr。碰撞事件合理地解释了 O9V 恒星 ALS15348 的形成，以及斯皮策气泡 N19 的形状。在 SE 云中发现了类似的速度结构，它与 O7.5V 恒星 HD168504 相关。此外，在整个 GMC 中发现的两个速度分量的互补分布表明碰撞事件是全球发生的。基于以上结果，