We report the detection of quasi-periodic oscillations (QPOs) in the radio light curve of the blazar PKS 1510-089 spanning nearly 38 years, by means of the weighted wavelet Z-transform and Lomb–Scargle periodogram methods. Prominent QPOs with high confidence (>4\(\sigma \)) of \(570\pm 30\), \(800\pm 30,\) and \(1070\pm 40\) days in the 8 GHz light curve, \(430\pm 10\) and \(1080\pm 30\) days in the 14.5 GHz light curve have been identified after estimating the significance against the red noise background. Moreover, the most significant QPO of about 1080 days exceeded \(4 \sigma \) confidence level at two of the three frequencies but did not exactly persist the whole observations, indicating that QPOs in blazars are transient in nature. We suggest that the search for QPO in blazar light curves should evaluate the statistical significances and consider the influences of the colored noise, after reviewing earlier QPO claims of PKS 1510-089.

我们报告了通过加权小波 Z 变换和 Lomb-Scargle 周期图方法在 blazar PKS 1510-089 的射电光曲线中检测到近 38 年的准周期振荡（QPO）。在 8 GHz 光变曲线中具有高置信度 (>4 \(\sigma \) ) \(570\pm 30\)、\(800\pm 30,\)和\(1070\pm 40\)天的突出 QPO , \(430\pm 10\)和\(1080\pm 30\)在 14.5 GHz 光变曲线中的天数在估计红噪声背景的显着性后已经确定。此外，约 1080 天的最显着 QPO 超过了\(4 \sigma \)三个频率中的两个频率的置信水平，但并没有完全保持整个观察结果，表明 blazars 中的 QPO 本质上是瞬态的。我们建议在回顾 PKS 1510-089 之前的 QPO 声明后，在耀变体光曲线中搜索 QPO 应评估统计显着性并考虑有色噪声的影响。