论文标题
围绕0类Protostar L1527 IRS的爆发,不对称磁盘的VLA视图
A VLA View of the Flared, Asymmetric Disk Around the Class 0 Protostar L1527 IRS
论文作者
论文摘要
我们在7 mm,1.3 cm和2 cm波长时对高分辨率Karl G. Jansky非常大的阵列(VLA)观察结果。我们在所有三个波长处检测到边缘尘埃,发现它是不对称的,磁盘的南侧比北侧更明亮。我们通过分析建模证实了这种不对称性,还发现磁盘以7 mm的速度张开。我们针对包括强度概况中的差距功能在内的模型测试数据,尽管我们不能排除此类模型,但它们对数据拟合质量的统计学上没有显着改善。但是,从这些拟合中,我们可以对可能存在的任何差距的允许属性放置约束,这些差距可能存在于真实的基础强度轮廓中。由于磁盘的边缘性质,不对称性的物理性质很难与物理特征相关联,但可能与其他更多面向磁盘的成像中看到的螺旋臂或不对称有关。
We present high resolution Karl G. Jansky Very Large Array (VLA) observations of the protostar L1527 IRS at 7 mm, 1.3 cm, and 2 cm wavelengths. We detect the edge-on dust disk at all three wavelengths and find that it is asymmetric, with the southern side of the disk brighter than the northern side. We confirm this asymmetry through analytic modeling and also find that the disk is flared at 7 mm. We test the data against models including gap features in the intensity profile, and though we cannot rule such models out, they do not provide a statistically significant improvement in the quality of fit to the data. From these fits, we can however place constraints on allowed properties of any gaps that could be present in the true, underlying intensity profile. The physical nature of the asymmetry is difficult to associate with physical features due to the edge-on nature of the disk, but could be related to spiral arms or asymmetries seen in other imaging of more face-on disks.