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Substructure Formation in a Protostellar Disk of L1527 IRS
The Astrophysical Journal Letters ( IF 7.9 ) Pub Date : 2020-05-14 , DOI: 10.3847/2041-8213/ab8eaa
Riouhei Nakatani , Hauyu Baobab Liu , Satoshi Ohashi , Yichen Zhang , Tomoyuki Hanawa , Claire Chandler , Yoko Oya , Nami Sakai

We analyze multifrequency, high-resolution continuum data obtained by the Atacama Large Millimeter/submillimeter Array and the Jansky Very Lary Array to study the detailed structure of the dust distribution in the infant disk of a Class 0/I source, L1527 IRS. We find three clumps aligning in the north–south direction in the 7 mm radio continuum image. The three clumps remain even after subtracting free–free contamination, which is estimated from the 1.3 cm continuum observations. The northern and southern clumps are located at a distance of ∼15 au from the central clump and are likely optically thick at 7 mm wavelength. The clumps have similar integrated intensities. The symmetric physical properties could be realized when a dust ring, or spiral arms, around the central protostar is projected to the plane of the sky. We demonstrate for the first time that such substructure may form even in the disk-forming stage, where the surrounding materials actively accrete toward a disk-pro...

中文翻译:

L1527 IRS的元星盘中的子结构形成

我们分析了由Atacama大毫米/亚毫米阵列和Jansky Very Lary阵列获得的多频率,高分辨率连续体数据,以研究0 / I类源L1527 IRS婴儿盘中灰尘分布的详细结构。我们在7毫米射电连续图像中发现了三个在南北方向对齐的团块。即使减去自由污染,这三个团块仍然存在,这是根据1.3厘米连续观测得出的。北部和南部的团块与中心团块的距离约为15 au,在7 mm的波长处可能光学上较厚。团块具有相似的综合强度。当围绕中央原恒星的尘埃环或螺旋臂投射到天空平面时,可以实现对称的物理属性。
更新日期:2020-05-14
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