ABSTRACT

Using the Lomb–Scargle periodogram and the weighted wavelet Z-transform techniques, we have searched for quasi-periodic oscillations (QPOs) of the BL Lacertae object (BL Lac), PKS J2134–0153, in the 15-GHz radio light curve announced by the Owens Valley Radio Observatory 40-m telescope during the period from 2008 January 5 to 2019 May 18. This is the first time that the search for periodic radio signals in the BL Lac PKS J2134–0153 has used these two methods, which consistently reveal a QPO of 4.69 ± 0.14 yr (>5σ confidence level). We discuss possible causes for this QPO, and we expect that the binary black hole scenario, where the QPO is caused by the precession of a binary black hole, is the most likely explanation. Thus, the BL Lac PKS J2134–0153 could be a good candidate for a binary black hole. In the binary black hole scenario, the distance between the primary black hole and the secondary black hole is a ∼ 1.83 × 10¹⁶ cm.

中文翻译：

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在 BL Lac PKS J2134–0153 中检测到可能的高置信度无线电准周期振荡

摘要

使用 Lomb-Scargle 周期图和加权小波Z-变换技术，我们在欧文斯谷射电天文台 40 米望远镜公布的 15 GHz 射电光曲线中搜索了 BL Lacertae 天体（BL Lac）PKS J2134-0153 的准周期振荡（QPO）。 2008 年 1 月 5 日至 2019 年 5 月 18 日期间。 这是首次使用这两种方法在 BL Lac PKS J2134-0153 中搜索周期性无线电信号，结果一致显示 QPO 为 4.69 ± 0.14 yr (>5σ置信水平）。我们讨论了这个 QPO 的可能原因，我们预计双黑洞场景是最可能的解释，其中 QPO 是由双黑洞的进动引起的。因此，BL Lac PKS J2134-0153 可能是双黑洞的一个很好的候选者。在双黑洞场景中，一〜1.83×10 ¹⁶厘米