论文标题
戈麦斯汉堡的三维视图
A Three Dimensional View of Gomez's Hamburger
论文作者
论文摘要
如果我们要面对嵌入式行星或动态不稳定性的模拟，则揭开原球盘的3D物理结构，温度和密度分布是必不可少的步骤。在本文中，我们着重于戈麦斯的汉堡包对边源源的亚毫米阵列观测值，据信托有一个过度密度，假设是圆盘中引力不稳定的产物，Goham b。我们证明，通过利用良好的特征性特征在于，开普勒圆盘旋转到位置位置 - 速度空间中分子线的旋转，从而将分子线旋转到中心坐标中，我们能够在（R，Z）平面和（X，Y，Z）空间中绘制发射分布。我们表明，12CO跟踪了$ z \，/\，r \ sim 0.3 $的高架层，而13co在$ z \，/\，r \ lyssim 0.2 $的光盘中更深入。我们将与Goham B相关的发射定位，在大约500 au的deprojection半径上找到它，并且从圆盘主要轴的 +\ -30度的极角度找到它。在$ \ sim 1.5^{\ prime \ prime} $的空间分辨率下，Goham B在空间上未解决，其半径为$ <190 $ 〜AU。
Unraveling the 3D physical structure, the temperature and density distribution, of protoplanetary discs is an essential step if we are to confront simulations of embedded planets or dynamical instabilities. In this paper we focus on Submillimeter Array observations of the edge-on source, Gomez's Hamburger, believed to host an over-density hypothesised to be a product of gravitational instability in the disc, GoHam b. We demonstrate that, by leveraging the well characterised rotation of a Keplerian disc to deproject observations of molecular lines in position-position-velocity space into disc-centric coordinates, we are able to map out the emission distribution in the (r, z) plane and (x, y, z) space. We show that 12CO traces an elevated layer of $z\,/\,r \sim 0.3$, while 13CO traces deeper in the disc at $z\,/\,r \lesssim 0.2$. We localize emission associated with GoHam b, finding it at deprojected radius of approximately 500 au and at polar angle of +\- 30 degrees from the disc major axis. At the spatial resolution of $\sim 1.5^{\prime\prime}$, GoHam b is spatially unresolved, with an upper limit to its radius of $<190$~au.
