垂直呼吸波的模式速度
The pattern speeds of vertical breathing waves
摘要：
我们测量和比较的模式速度的垂直呼吸，垂直弯曲，螺旋密度波在两个孤立的N体+SPH模拟，使用窗口傅立叶变换超过1陀螺仪的时间间隔。我们表明，呼吸波的模式速度匹配的螺旋，但不同于弯曲波。我们还观察到酒吧和呼吸波之间的匹配模式速度。我们的研究结果不仅加强的情况下，在整个光盘，呼吸运动是由螺旋驱动，但事实上，呼吸运动的一部分和包裹的螺旋。
英文摘要：
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.
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