Title: the impact of the AGN and the torus properties on the evolution of spiral galaxies Show Chinese title

Title: 活动星系核(AGN)及其星周环性质对螺旋星系演化的影响

Abstract: For spiral galaxies, the active galactic nucleus (AGN) and some physical parameters that concern the host galaxy such as spiral arm radius and density can play an important role in the morphological evolution of these galaxies. Considering the gravitational effect of the central black hole as a feeding mechanism, the gas flows from spiral arms to the accretion disk. Accordingly, we constructed our approach and derived an equation for the AGN luminosity that depends on parameters such as the black hole mass and the spiral arm density. The galaxy samples were taken from a catalog of type 1 AGN from SDSS-DR7. In our model, we present the relation between the AGN luminosity and the black hole mass depending on the above physical parameters. We also investigated the relation between the black hole mass and the star formation rate for the galaxy sample. The physical properties of the torus, such as the spiral arm radius, density, the torus length, and the gas mass, and the star formation rate, were explained in terms of the variation of the AGN luminosity. These properties are more effective in the evolutionary scenario of the spiral galaxy. Relative to the variation of the AGN luminosity, the evolutionary track is different based quantitatively on the star formation rate. In which the variation in the star formation rate is positively correlated with the AGN luminosity. Show Chinese abstract

Abstract: 对于螺旋星系而言，活动星系核（AGN）以及与宿主星系相关的物理参数（例如旋臂半径和密度）在这些星系的形态演化中起着重要作用。 考虑到中心黑洞的引力效应作为供能机制，气体从旋臂流向吸积盘。 因此，我们构建了我们的方法，并推导出一个依赖于黑洞质量和旋臂密度等参数的AGN亮度方程。 星系样本取自SDSS-DR7的I型AGN目录。 在我们的模型中，我们展示了AGN亮度与黑洞质量之间的关系，这取决于上述物理参数。 我们还研究了黑洞质量与星系样本中的恒星形成率之间的关系。 例如旋臂半径、密度、环状结构长度和气体质量等环状结构的物理性质，以及恒星形成率，都可以用AGN亮度的变化来解释。 这些性质在螺旋星系的演化场景中更为有效。 相对于AGN亮度的变化，基于恒星形成率的演化轨迹在数量上有所不同。 其中恒星形成率的变化与AGN亮度呈正相关。