论文标题
A 3.8年蓝色类星体SDSS中的光学准周期振荡J132144+033055通过CSS和ZTF的合并光曲线
A 3.8yr optical quasi-periodic oscillations in blue quasar SDSS J132144+033055 through combined light curves from CSS and ZTF
论文作者
论文摘要
在手稿中，在蓝色的Quasi periodic振荡（QPO）中，在蓝色的Quasar SDSS J132144+033055（= \ obj）中以$ z = 0.269 $的形式报告，基于CSS和ZTF的16.3yr-Long Light Curve，直接来自CSS和ZTF，并直接由Sinusoid sinusoid函数描述。可以通过相折叠的光曲线和WWZ技术的属性，通过置信水平高于5 $σ$的广义lomb-Scargle期间图确认3.8yr QPO。此外，收集的泛星曲线曲线很好地遵循正弦函数描述了CSS和ZTF光曲线的最佳拟合结果。光学QPO强烈表明\ obj中的一个中央二进制黑洞（BBH）系统，预期空间分离小于0.018pc，通过估计的总BH质量$ 3.3 \ times10^9 {\ rm m_ \ odot} $，通过BH质量和持续元素之间的相关性。同时，我们检查应用用于解释光学QPO的磁盘进动。但是，在磁盘进液假设下，来自中央BH的确定的光发射区的尺寸约为$ 37 {\ rm r_g} $，与预期NUV发射区域的$ 35 {\ rm r_g} $相似，这是通过磁盘尺寸和BH质量之间的相关性的，表示DISK PERSESPERSY均不优先。而且由于未被发现的无线电排放，可以排除喷气序列。此外，只有0.1 \％的概率可以确定为通过与内在AGN活动相关的随机创建的光曲线进行错误检测的QPO，重新引起光学QPO，其显着性水平高于3 $σ$。因此，在不久的将来，将CSS和ZTF的长期光曲线结合起来会导致更多的QPO候选者。
In the manuscript, a 3.8yr optical quasi-periodic oscillations (QPOs) is reported in blue quasar SDSS J132144+033055 (=\obj) at $z=0.269$, based on 16.3yr-long light curve from both CSS and ZTF directly described by a sinusoidal function. The 3.8yr QPOs can be confirmed through the Generalized Lomb-Scargle periodogram with confidence level higher than 5$σ$, through properties of the phase-folded light curve and the WWZ technique. Moreover, the collected Pan-STARRS light curves well follow the sinusoidal function described best fitting results to the CSS and ZTF light curves. The optical QPOs strongly indicate a central binary black hole (BBH) system in \obj, with expected space separation smaller than 0.018pc, through the estimated upper limit of total BH mass $3.3\times10^9{\rm M_\odot}$ through the correlation between BH mass and continuum luminosity. Meanwhile, we check disk precession applied to explain the optical QPOs. However, under the disk precession assumption, the determined optical emission regions from central BH have sizes about $37{\rm R_G}$ similar as the sizes $35{\rm R_G}$ of the expected NUV emission regions through the correlation between disk size and BH mass, indicating the disk precession is not preferred. And due to undetected radio emissions, jet precession can be ruled out. Furthermore, only 0.1\% probability can determined as the QPOs mis-detected through CAR process randomly created light curves related to intrinsic AGN activities, re-confirming the optical QPOs with significance level higher than 3$σ$. Therefore, combining long-term light curves from CSS and ZTF can lead to more QPOs candidates in the near future.
