论文标题
L1527 IRS的原始磁盘中的子结构形成
Substructure Formation in a Protostellar Disk of L1527 IRS
论文作者
论文摘要
我们分析了Alma和JVLA获得的多频率，高分辨率连续数据，以研究〜0/I级别源的婴儿磁盘中灰尘分布的详细结构，L1527 IRS。我们发现三个团块在$ 7 {\ rm \，mm} $无线电连续图映像中以南北方向对齐。即使在减去免费的免费污染后，这三个团块仍保留，这是从$ 1.3 {\ rm \，CM} $ Continuum观测值中估计的。北部和南部团块位于中央团块的$ \ sim 15 {\ rm \，au} $的距离，很可能在$ 7 {\ rm \，mm} $波长的光学上厚。团块具有相似的集成强度。当将中央原恒星周围的灰尘环或螺旋臂投射到天空平面时，可以实现对称的物理特性。我们首次证明，即使是在磁盘形成阶段，周围材料会积极地倾向磁盘 - 普罗托斯塔尔系统。
We analyze multi-frequency, high-resolution continuum data obtained by ALMA and JVLA to study 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 $7 {\rm \,mm}$ radio continuum image. The three clumps remain even after subtracting free-free contamination, which is estimated from the $1.3{\rm \,cm}$ continuum observations. The northern and southern clumps are located at a distance of $\sim 15{\rm \,au}$ from the central clump and are likely optically thick at $7{\rm \,mm}$ 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 demonstrates for the first time that such substructure may form even in the disk-forming stage, where the surrounding materials actively accrete toward a disk-protostar system.
