论文标题
测试一种嵌入式原始磁盘的新模型，以防止观察：大多数Orion Class 0/I磁盘可能是温暖，巨大和重力不稳定的
Testing a New Model of Embedded Protostellar Disks Against Observation: The Majority of Orion Class 0/I Disks Are Likely Warm, Massive, and Gravitationally Unstable
论文作者
论文摘要
我们制定了嵌入式原恒星磁盘的参数化模型，并通过拟合尘埃观测来测试其估计磁盘性能的能力。我们模型的主要物理假设是由近期的原始磁盘形成的理论研究激发的。这些假设包括磁盘应在重力上不稳定，并且主要的灰尘加热机制是内部积聚加热，而不是外部原恒星照射。这些假设允许我们的模型可靠地估计磁盘质量，即使观察到的发射在光学上厚并自愿确定磁盘（灰尘）温度。在Vandam猎户座调查中，使用我们的模型拟合156个磁盘的多波长观测值，我们发现该样品的大多数（57％）可以很好地符合我们的模型。使用我们的模型，我们产生了Orion Protostellar磁盘性能的新估计。我们发现这些磁盘通常是温暖而大的，具有典型的星到盘质量比$ m _ {\ rm d}/m_ \ star = \ star = \ Mathcal o（1）$（1）$（1）$ in Class 0/i。我们还讨论了为什么我们的估计与以前的研究中的估计以及结果对磁盘进化和分裂的含义有所不同。
We formulate a parametrized model of embedded protostellar disks and test its ability to estimate disk properties by fitting dust-continuum observations. The main physical assumptions of our model are motivated by a recent theoretical study of protostellar disk formation; these assumptions include that the disk should be marginally gravitationally unstable, and that the dominant dust heating mechanism is internal accretion heating instead of external protostellar irradiation. These assumptions allow our model to reliably estimate the disk mass even when the observed emission is optically thick and to self-consistently determine disk (dust) temperature. Using our model to fit multi-wavelength observations of 156 disks in the VANDAM Orion survey, we find that the majority (57%) of this sample can be fit well by our model. Using our model, we produce new estimates of Orion protostellar disk properties. We find that these disks are generally warm and massive, with a typical star-to-disk mass ratio $M_{\rm d}/M_\star = \mathcal O(1)$ in Class 0/I. We also discuss why our estimates differ from those in previous studies and the implications of our results on disk evolution and fragmentation.
