A VLA View of the Flared, Asymmetric Disk around the Class 0 Protostar L1527 IRS-猫眼课题宝

DOI：

10.3847/1538-4357/ac7a3b

发表时间：

2022-06

期刊：

The Astrophysical Journal

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

P. Sheehan;J. Tobin;Zhi-Yun Li;M. V. ’. van ’t Hoff;J. Jørgensen;W. Kwon;L. Looney;N. Ohashi;S. Takakuwa;Jonathan P. Williams;Yusuke Aso;S. Gavino;I. Gregorio-Monsalvo;I. Han;C. Lee;A. Plunkett;Rajeeb Sharma;Y. Aikawa;S. Lai;Jeong-Eun Lee;Zheyu Lin;K. Saigo;K. Tomida;Hsi-Wei Yen

我们提出了高分辨率的卡尔G。Jansky甚大阵列（VLA）在7毫米、1.3厘米和2厘米波长下对原恒星L1527 IRS的观测。我们在所有三个波长上都探测到了边缘尘埃盘，发现它是不对称的，盘的南侧比北方亮。我们确认这种不对称性，通过分析建模，也发现，磁盘是在7毫米。我们测试的数据对模型，包括在强度分布的间隙功能，虽然我们不能排除这种模式，他们不提供一个统计学上显着的改善质量的数据拟合。然而，从这些拟合中，我们可以对可能存在于真实的、潜在的强度分布中的任何间隙的允许属性设置约束。不对称的物理性质很难与物理特征相关联，因为磁盘的边缘性质，但它可能与螺旋臂或在其他成像中看到的不对称性有关。

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 owing to the edge-on nature of the disk, but it could be related to spiral arms or asymmetries seen in other imaging of more face-on disks.

A VLA View of the Flared, Asymmetric Disk around the Class 0 Protostar L1527 IRS

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