论文标题
垂直呼吸波的图案速度
The pattern speeds of vertical breathing waves
论文作者
论文摘要
我们使用窗户的傅立叶变换在1 GYR时间隔内测量和比较了两个孤立的N体+SPH模拟中垂直呼吸，垂直弯曲和螺旋密度波的模式速度。我们表明，呼吸波的图案速度与螺旋的速度相匹配，但与弯曲波的速度不同。我们还观察到杆和呼吸波之间的匹配模式速度。我们的结果不仅加强了在整个圆盘中，呼吸运动是由螺旋驱动的，而且确实是呼吸运动是螺旋形的一部分和包裹。
We measure and compare the pattern speeds of vertical breathing, vertical bending, and spiral density waves in two isolated N-body+SPH simulations, using windowed Fourier transforms over 1 Gyr time intervals. We show that the pattern speeds of the breathing waves match those of the spirals but are different from those of the bending waves. We also observe matching pattern speeds between the bar and breathing waves. Our results not only strengthen the case that, throughout the disc, breathing motions are driven by spirals but indeed that the breathing motions are part and parcel of the spirals.
