We investigate the parameters of global solar p-mode oscillations, namely damping width Γ$\Gamma$, amplitude A$A$, mean squared velocity 〈v2〉$\langle v^{2}\rangle$, energy E$E$, and energy supply rate dE/dt$\mathrm{d}E/\mathrm{d}t$, derived from two solar cycles’ worth (1996 – 2018) of Global Oscillation Network Group (GONG) time series for harmonic degrees l=0–150$l=0\,\mbox{--}\,150$. We correct for the effect of fill factor, apparent solar radius, and spurious jumps in the mode amplitudes. We find that the amplitude of the activity-related changes of Γ$\Gamma$ and A$A$ depends on both frequency and harmonic degree of the modes, with the largest variations of Γ$\Gamma$ for modes with 2400μHz≤ν≤3300μHz$2400~\upmu\mbox{Hz}\le\nu\le3300~\upmu\mbox{Hz}$ and 31≤l≤60$31\le l \le60$ with a minimum-to-maximum variation of 26.6±0.3%$26.6\pm0.3\%$ and of A$A$ for modes with 2400μHz≤ν≤3300μHz$2400~\upmu\mbox{Hz}\le\nu\le 3300~\upmu\mbox{Hz}$ and 61≤l≤100$61\le l \le100$ with a minimum-to-maximum variation of 27.4±0.4%$27.4\pm0.4\%$. The level of correlation between the solar radio flux F10.7$F_{10.7}$ and mode parameters also depends on mode frequency and harmonic degree. As a function of mode frequency, the mode amplitudes are found to follow an asymmetric Voigt profile with νmax=3073.59±0.18μHz$\nu_{\text{max}}=3073.59\pm0.18~\upmu\mbox{Hz}$. From the mode parameters, we calculate physical mode quantities and average them over specific mode frequency ranges. In this way, we find that the mean squared velocities 〈v2〉$\langle v^{2}\rangle$ and energies E$E$ of p modes are anticorrelated with the level of activity, varying by 14.7±0.3%$14.7\pm0.3\%$ and 18.4±0.3%$18.4\pm0.3\%$, respectively, and that the mode energy supply rates show no significant correlation with activity. With this study we expand previously published results on the temporal variation of solar p-mode parameters. Our results will be helpful to future studies of the excitation and damping of p modes, i.e., the interplay between convection, magnetic field, and resonant acoustic oscillations.

中文翻译：

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通过两个太阳周期的 GONG p 模式参数

我们研究了全球太阳 p 模式振荡的参数，即阻尼宽度 Γ$\Gamma$、幅度 A$A$、均方速度 <v2>$\langle v^{2}\rangle$、能量 E$E$ , 和能源供应率 dE/dt$\mathrm{d}E/\mathrm{d}t$，来自两个太阳周期的价值（1996 - 2018）全球振荡网络组 (GONG) 时间序列的谐波度 l =0–150$l=0\,\mbox{--}\,150$。我们校正了填充因子、视太阳半径和模式幅度中的杂散跳跃的影响。我们发现Γ$\Gamma$和A$A$的活动相关变化幅度取决于模式的频率和谐波程度，对于2400μHz≤ν≤的模式，Γ$\Gamma$的变化最大3300μHz$2400~\upmu\mbox{Hz}\le\nu\le3300~\upmu\mbox{Hz}$和31≤l≤60$31\le l \le60$，最小到最大变化为26.6±0.3 %$26.6\pm0. 3\%$ 和 A$A$ 对于 2400μHz≤ν≤3300μHz$2400~\upmu\mbox{Hz}\le\nu\le 3300~\upmu\mbox{Hz}$ 和 61≤l≤100$61 的模式\le l \le100$，最小到最大变化为 27.4±0.4%$27.4\pm0.4\%$。太阳射电通量 F10.7$F_{10.7}$ 和模式参数之间的相关程度还取决于模式频率和谐波程度。作为模式频率的函数，发现模式幅度遵循不对称 Voigt 曲线，νmax=3073.59±0.18μHz$\nu_{\text{max}}=3073.59\pm0.18~\upmu\mbox{Hz}$ . 根据模式参数，我们计算物理模式量并在特定模式频率范围内对其进行平均。通过这种方式，我们发现 p 模式的均方速度 <v2>$\langle v^{2}\rangle$ 和能量 E$E$ 与活动水平反相关，变化幅度为 14.7±0.3%$14.7\ pm0.3\%$ 和 18.4±0.3%$18.4\pm0.3\%$, 分别，并且模式能量供应率与活动没有显着相关性。通过这项研究，我们扩展了先前发表的关于太阳 p 模式参数的时间变化的结果。我们的结果将有助于未来研究 p 模式的激发和阻尼，即对流、磁场和共振声学振荡之间的相互作用。