The Robustness of Synthetic Observations in Producing Observed Core Properties: Predictions for the TolTEC Clouds to Cores Legacy Survey
The Robustness of Synthetic Observations in Producing Observed Core Properties: Predictions for the TolTEC Clouds to Cores Legacy Survey
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DOI：
10.3847/1538-4357/ac2666
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发表时间：
2021-09
期刊：
影响因子：
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通讯作者：
S. Betti;R. Gutermuth;S. Offner;G. Wilson;A. Sokol;R. Pokhrel
中科院分区：
文献类型：
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作者：
S. Betti;R. Gutermuth;S. Offner;G. Wilson;A. Sokol;R. Pokhrel
我们使用流体动力学模拟恒星形成气体与恒星反馈和下沉粒子代理年轻恒星物体（YSO）-生产和分析合成1.1毫米连续观测在不同的距离（150-1000 pc）和年龄（0.49-1.27百万年）。我们的特征如何推断的核心属性，包括质量，大小和集群相对于弥漫的纳塔尔气体结构，随着距离的变化，云的演变，和YSO的存在。我们发现，大气过滤和核心分割处理有距离依赖的影响，所产生的核心属性为d < 300 pc和500 pc，分别占主导地位的进化差异。集中在更远距离（650-1000 pc）的合成观测，我们发现在模拟中有和没有YSO的核心的推断大小和质量之间的分离越来越大，这在最近对Monoceros R2（Mon R2）云在860 pc的观测中没有看到。我们发现，合成核心集群在较小的群体，其质量密度与气体柱密度在一个更窄的范围内，比那些在周一R2的观测。这种差异限制了我们在这里报告的进化预测的适用性，但将激励我们未来的努力，以适应我们的综合观测和分析框架，以下一代模拟，如气体环境中的星星形成（STARFORGE）。这些预测和系统的表征将有助于指导即将进行的大型毫米波望远镜阿方索塞拉诺上的TolTEC云到核心遗产调查的核心分析。
We use hydrodynamical simulations of star-forming gas with stellar feedback and sink particles—proxies for young stellar objects (YSOs)—to produce and analyze synthetic 1.1 mm continuum observations at different distances (150–1000 pc) and ages (0.49–1.27 Myr). We characterize how the inferred core properties, including mass, size, and clustering with respect to diffuse natal gas structure, change with distance, cloud evolution, and the presence of YSOs. We find that atmospheric filtering and core segmentation treatments have distance-dependent impacts on the resulting core properties for d < 300 pc and 500 pc, respectively, which dominate over evolutionary differences. Concentrating on synthetic observations at further distances (650–1000 pc), we find a growing separation between the inferred sizes and masses of cores with and without YSOs in the simulations, which is not seen in recent observations of the Monoceros R2 (Mon R2) cloud at 860 pc. We find that the synthetic cores cluster in smaller groups, and that their mass densities are correlated with gas column density over a much narrower range, than those in the Mon R2 observations. Such differences limit the applicability of the evolutionary predictions we report here, but will motivate our future efforts to adapt our synthetic observation and analysis framework to next generation simulations, such as Star Formation in Gaseous Environments (STARFORGE). These predictions and systematic characterizations will help to guide the analysis of cores on the upcoming TolTEC Clouds to Cores Legacy Survey on the Large Millimeter Telescope Alfonso Serrano.