摘要: The effects of pure acoustic waves of several different frequencies are investigated on a number of Fe I lines formed in the photosphere. A dynamical model is used of the waves to compute the line profiles at several different pha... 展开 The effects of pure acoustic waves of several different frequencies are investigated on a number of Fe I lines formed in the photosphere. A dynamical model is used of the waves to compute the line profiles at several different phases of the wave. From the computed profiles we derive the rms fluctuations in the position and intensity of the profiles at several different phases of the wave. From the computed profiles we derive the rms fluctuations in the position and intensity of the profiles over one period of the wave, phase differences between the core of the line and the bisectors of the same line, and properties of the time averaged profile. The rms fluctuations of the line core position and the rms fluctuations of the position of the center of gravity are seen to decrease with increasing frequency of the waves. The line-center position of the time-averaged profiles show increasing redshifts with frequency to frequencies near 0.21 radians/s (P=30 s); at higher frequencies the redshifts decrease, and some lines become blueshifted for frequencies above 0.5 radians/s. Phase differences between fluctuations in the core of one line and bisectors of the same line or the cores of other lines depend almost linearly on the difference between heights of formation and linearly on the frequency of the wave. Computed phase differences between bisectors of one line and bisectors of another line do not show this simple behavior. 收起