论文标题
与阿尔玛一起捕捉蝴蝶和$η$ carinae
Catching the Butterfly and the Homunculus of $η$ Carinae with ALMA
论文作者
论文摘要
位于$η$ carinae附近附近的分子气体成分的性质和起源仍然远非完全理解。在这里，我们提出了Atacama大毫米/亚毫米阵列（ALMA）CO（3 $ - $ 2）的观测值，具有高角度分辨率（$ \ sim $ 0.15 $'$），并且采用了极大的敏感性来揭示此组件在$η$ Carinae中的起源。这些观察结果显示出比以前报道的蓝色和红移分子热排放的速度要高得多（$ 300至$+$+$ 270 km s $^{ - 1} $），我们将其与Nebula的小叶相吻合，这很好地描绘了较高的和蓝色的lobes lobes lobes the Entermost firber the Enlermost firber-sight lim sight lim sight lim sight lim-sigh lim prime。提议红移发射的内部轮廓是{\它破坏了圆环}，但在这里我们透露，它至少是分子发射的一部分，起源于叶和/或膨胀的赤道裙。另一方面，更接近全身速度（$ \ pm $ 100 km s $^{ - 1} $），CO分子气体痕迹痕迹在NIR和MIR波长处显示为屏蔽粉尘所居住的区域。分子成分的位置和运动学表明，这种材料在$η$ carinae的不同喷发后形成。
The nature and origin of the molecular gas component located in the circumstellar vicinity of $η$ Carinae are still far from being completely understood. Here, we present Atacama Large Millimeter/Submillimeter Array (ALMA) CO(3$-$2) observations with a high angular resolution ($\sim$0.15$''$), and a great sensitivity that are employed to reveal the origin of this component in $η$ Carinae. These observations reveal much higher velocity ($-$300 to $+$270 km s$^{-1}$) blue and redshifted molecular thermal emission than previously reported, which we associate with the lobes of the Homunculus Nebula, and that delineates very well the innermost contours of the red- and blue-shifted lobes likely due by limb brightening. The inner contour of the redshifted emission was proposed to be a {\it disrupted torus}, but here we revealed that it is at least part of the molecular emission originated from the lobes and/or the expanding equatorial skirt. On the other hand, closer to systemic velocities ($\pm$100 km s$^{-1}$), the CO molecular gas traces an inner butterfly-shaped structure that is also revealed at NIR and MIR wavelengths as the region in which the shielded dust resides. The location and kinematics of the molecular component indicate that this material has formed after the different eruptions of $η$ Carinae.
