标题： 相对论喷流反馈在演化星系中 显示英文标题

标题： Relativistic Jet Feedback in Evolving Galaxies

摘要： 在宇宙时间尺度上，星系通过较小星系的分层合并而增长。 然而，星系光度函数的明亮区域与最简单的分层合并版本不兼容，人们认为宿主星系中心黑洞的反馈减少了明亮星系的数量，并调节了黑洞和宿主星系的共同演化。 众多星系演化的模拟尝试以通常超过千秒差距的分辨率包含这种反馈的物理效应。 然而，喷流与星际介质之间的相互作用涉及小于千秒差距尺度的过程。 为了进一步理解这些尺度上的过程，我们展示了一套相对论喷流与分形两相星际介质相互作用的模拟，分辨率为两个秒差距，最大尺度为一千秒差距。 能量和动量向星际介质的传递是显著的，我们发现功率范围在10^43-10^46 erg s^-1的喷流可以通过分散星系核心的致密气体来抑制恒星形成。 我们确定了这一过程的有效性作为喷流功率与黑洞爱丁顿光度比值、星际介质压力和致密气体孔隙率的函数。 显示英文摘要

摘要： Over cosmic time, galaxies grow through the hierarchical merging of smaller galaxies. However, the bright region of the galaxy luminosity function is incompatible with the simplest version of hierarchical merging, and it is believed that feedback from the central black hole in the host galaxies reduces the number of bright galaxies and regulates the co-evolution of black hole and host galaxy. Numerous simulations of galaxy evolution have attempted to include the physical effects of such feedback with a resolution usually exceeding a kiloparsec. However, interactions between jets and the interstellar medium involve processes occurring on less than kiloparsec scales. In order to further the understanding of processes occurring on such scales, we present a suite of simulations of relativistic jets interacting with a fractal two-phase interstellar medium with a resolution of two parsecs and a largest scale of one kiloparsec. The transfer of energy and momentum to the interstellar medium is considerable, and we find that jets with powers in the range of 10^43-10^46 erg s^-1 can inhibit star formation through the dispersal of dense gas in the galaxy core. We determine the effectiveness of this process as a function of the ratio of the jet power to the Eddington luminosity of the black hole, the pressure of the interstellar medium and the porosity of the dense gas.