论文标题
固定恒星中的块状积聚，作为情节磁盘扰动的来源
Clumpy accretion in pre-main-sequence stars as a source of perturbations in circumstellar disks
论文作者
论文摘要
研究了由块状积聚引起的预序列恒星的扰动的发展。在这里，我们对最近的团块积聚事件进行了3D流体动力平滑的粒子流体动力学模拟。通过辐射转移计算进一步探索了这些模拟，以量化此类磁盘的观察性外观。结果表明，磁盘中的密度波是在团块掉落的。经过几次革命后，它们可以转变为螺旋和环结构。它们的图像与毫米波长非常相似，与某些原星磁盘中Atacama大毫米/亚毫米阵列观察到的图像非常相似。我们假设块状积聚可能是这种结构的来源。
The development of perturbations in the circumstellar disks of pre-main-sequence stars caused by clumpy accretion was investigated. Here we perform 3D hydrodynamical smoothed particle hydrodynamics simulations of disks perturbed by a recent clump accretion event. These simulations are further explored by radiative transfer calculations to quantify the observational appearance of such disks. It was shown that the density waves in the disks were formed at the fall of the clump. After several revolutions they can transform into spirals and ring structures. Their images in millimeter wavelengths are very similar to those observed with Atacama Large Millimeter/submillimeter Array in some protoplanetary disks. We assume that clumpy accretion may be the source of such structures.
