Another possibility is that large-scale spiral waves in the disk, similar to the spiral arms observed in galaxies, hasten the inflow of matter.
Another possibility is that large-scale spiral waves in the disk, similar to the spiral arms observed in galaxies, hasten the inflow of matter.
另一个可能性是，类似星系旋臂的大尺度螺旋波，加剧了物质的向内流动。