The young shell-type supernova remnant RCW 103 has peculiar properties in the X-ray morphology obtained with Chandra. The southeastern shell is brighter in the X-rays, and the curved border of the shell in this region is flatter than the other part.We investigate the formation of the peculiar periphery of the supernova remnant RCW 103 using 3D hydrodynamical simulation. Assuming that the supernova ejecta has been evolved in the medium with a density gradient, the detected shape of the periphery can be generally reproduced. For RCW 103, with the ejecta mass of 3.0 M _⊙, the density of the background material of 2.0 cm⁻³, and a gradient of 3.3 − 4.0 cm⁻³ pc⁻¹, the X-ray periphery can be generally reproduced. The simulation turned out that the asymmetry of the SNR RCW 103 is mainly due to the inhomogeneous medium with a density gradient.

年轻的壳型超新星遗迹 RCW 103 在用钱德拉获得的 X 射线形态中具有特殊的性质。东南壳在X射线下较亮，该区域壳的弯曲边界比其他部分更平坦。我们利用3D流体动力学模拟研究了超新星遗迹RCW 103特殊外围的形成。假设超新星喷射物已经在具有密​​度梯度的介质中演化，探测到的外围形状大致可以再现。对于RCW 103，喷出物质量为3.0 M⊙ ，背景 _物质密度为2.0 cm ^-3，梯度为3.3 − 4.0 cm ^-3 pc ^-1, X 射线外围一般可以再现。模拟结果表明，信噪比 RCW 103 的不对称主要是由于具有密度梯度的不均匀介质造成的。