中心分子带的AzTEC调查：数据整理、分析和初步结果
AzTEC Survey of the Central Molecular Zone: Data Reduction, Analysis, and Preliminary Results
摘要：
我们提出了一个大规模的调查的中央分子区（CMZ）我们的银河系，以及Sgr A* 的监测计划，与AzTEC/大毫米望远镜（LMT）在1.1毫米连续。我们的1.1 mm地图覆盖了CMZ的主体，其视场为$1.6 \times 1.1$ deg $^2$，角分辨率为$10.5''$，深度为15 mJ/束。为了解释由于背景去除过程导致的强度损失，我们将该图与较低分辨率的CSO/Bolocam和\textit{Planck} /HFI数据相结合，以产生有效的全强度1.1 mm连续图。利用这张图和现有的\textit{Herschel}调查，我们对CMZ中尘埃的光谱能量分布（SED）进行了全面的分析。该分析的一个关键组成部分是实施基于模型的反卷积方法，将不同仪器的点扩散函数（PSF），从而恢复了大量的空间信息大于$10.5''$的角度尺度。对Sgr A* 的监测是作为全球多波长活动的一部分进行的，当时所谓的G2物体正在经历围绕大质量黑洞（MBH）的近心通道。我们的初步结果包括：1）高分辨率的柱密度，温度和尘埃光谱指数的地图，整个CMZ; 2）1.1毫米的光变曲线的Sgr A* 显示爆发的$140\%$最大振幅的2014年5月9日，但其他只是随机变化的$10\%$，没有系统的长期变化，与其他观测一致。
英文摘要：
We present a large-scale survey of the central molecular zone (CMZ) of our Galaxy, as well as a monitoring program of Sgr A*, with the AzTEC/Large Millimeter Telescope (LMT) in the 1.1 mm continuum. Our 1.1 mm map covers the main body of the CMZ over a field of $1.6 \times 1.1$ deg$^2$ with an angular resolution of $10.5''$ and a depth of 15 mJy/beam. To account for the intensity loss due to the background removal process, we combine this map with lower resolution CSO/Bolocam and \textit{Planck}/HFI data to produce an effective full intensity 1.1 mm continuum map. With this map and existing \textit{Herschel} surveys, we have carried out a comprehensive analysis of the spectral energy distribution (SED) of dust in the CMZ. A key component of this analysis is the implementation of a model-based deconvolution approach, incorporating the Point Spread Functions (PSFs) of the different instruments, and hence recovering a significant amount of spatial information on angular scales larger than $10.5''$. The monitoring of Sgr A* was carried out as part of a worldwide, multi-wavelength campaign when the so-called G2 object was undergoing the pericenter passage around the massive black hole (MBH). Our preliminary results include 1) high-resolution maps of column density, temperature and dust spectral index across the CMZ; 2) a 1.1~mm light curve of Sgr A* showing an outburst of $140\%$ maximum amplitude on 9th May, 2014 but otherwise only stochastic variations of $10\%$ and no systematic long-term change, consistent with other observations.
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