Gomez的汉堡包（IRAS 18059-3211）中的物理条件，
The physical conditions in Gomez's Hamburger (IRAS 18059-3211), a pre-MS rotating disk
摘要：
我们的目标是研究戈麦斯汉堡（IRAS 18059-3211; GoHam）的结构，动力学和物理条件。我们确认，GoHam基本上由一个耀斑盘开普勒旋转周围的年轻，可能前MS明星。本文给出了12 COJ =2-1、13 COJ =2 - 1、12 COJ =3-2和C_（17）O J=3-2的高分辨率SMA图，以及12 COJ =6-5和这些波长的连续通量数据。空间分辨率可达1”。除C17 O数据外，动力学范围均大于10。的地图进行比较的数值模型，它模拟了一个旋转的磁盘与预期的一般性质，这样的对象的排放，一个非常令人满意的拟合我们的地图。我们的结果的意义和可靠性进行了深入的讨论。我们的观测允许测量GoHam的主要性质，尺度在~ 1”（~ 5 10^15 cm，假设距离为300 pc）和星云的总长度14”之间。我们能够测量的全球结构的气体丰富的磁盘，这被发现是耀斑，其动态，这显然是由开普勒旋转，具有非常小的湍流程度。不同谱线的组合，特别是显示不同的不透明度，使我们能够合理地估计气体温度和密度的分布。我们清楚地发现，在离赤道很远的地方，温度显著而急剧地上升，同时密度也以同样的数量级下降。最后，我们确定并研究了在盘的南部没有对应的星云的其余部分的冷凝。这种凝聚相当大（约5 × 10 ^-15 cm），包含相当大的质量（约6 × 10^-3 Mo），似乎与可检测到的整体旋转运动学畸变有关。
英文摘要：
We aim to study the structure, dynamics and physical conditions of Gomez's Hamburger (IRAS 18059-3211; GoHam). We confirm that GoHam essentially consists of a flaring disk in keplerian rotation around a young, probably pre-MS star. We present high resolution SMA maps of 12CO J=2-1, 13CO J=2-1, 12CO J=3-2, and C17O J=3-2, as well as data on 12CO J=6-5 and the continuum flux at these wavelengths. Spatial resolutions up to 1" are obtained. Except for the C17O data, the dynamical ranges are larger than 10. The maps are compared to a numerical model, which simulates the emission of a rotating disk with the expected general properties of such objects; a very satisfactory fitting of our maps is obtained. The meaning and reliability of our results are thoroughly discussed. Our observations allow measurement of the main properties of GoHam at scales between ~ 1" (~ 5 10^15 cm, for the assumed distance, 300 pc) and the total extent of the nebula, 14". We are able to measure the global structure of the gas-rich disk, which is found to be flaring, and its dynamics, which is clearly dominated by keplerian rotation, with a very small degree of turbulence. The combination of different lines, particularly showing different opacities, allows us to reasonably estimate the distributions of the gas temperature and density. We clearly find a significant and sharp increase in temperature at large distances from the equator, accompanied by a decrease in density of the same order. Finally, we identify and study a condensation in the southern part of the disk that has no counterparts in the rest of the nebula. This condensation is quite extended (about 5 10^15 cm), contains a significant amount of mass (roughly, ~ 6 10^-3 Mo), and seems to be associated with a detectable distortion of the global rotation kinematics.
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