论文标题
使用无线电大型类星体的宇宙距离测量
A cosmological distance measure using radio-loud quasars
论文作者
论文摘要
我们使用无线电大型类星体（RLQ）的X射线光度关系来测量这些光度距离以及估计宇宙学参数。我们采用X射线光度的四个参数模型来测试RLQ和RAVITTER-I-I-I-CASARS（RIQ）的光度相关性，并给出这些宇宙学距离。根据贝叶斯信息准则（BIC），数据表明亮度关系$ {l_x} \ propto l_ {uv}^{γ_{γ_{uv}} l_ {radio}^radio}^{γ_{γ_{γ_{gadior}'}'} $ for rlqs与其他模型相关，与其他模型相关，与其他模型相关。同时，我们比较了扁平频谱无线电大声的类星体（FSRLQ）和陡峭的无线电大声 - 大型类星体（SSRLQ）的结果，这表明它们的光度相关性并不完全相同。我们还考虑将RLQ样品分为各种红移箱，可用于检查X射线光度关系是否取决于红移。最后，我们将RLQ和SNLA Pantheon的组合结合起来，以验证黑暗能量的性质，内容涉及其密度是否偏离常数，并给出统计结果。
We use the X-ray luminosity relation of radio-loud quasars (RLQs) to measure these luminosity distances as well as estimate cosmological parameters. We adopt four parametric models of X-ray luminosity to test luminosity correlation for RLQs and radio-intermediate quasars (RIQs) and give these cosmological distances. By Bayesian information criterion (BIC), the data suggest that the luminosity relation ${L_X} \propto L_{UV}^{γ_{uv}}L_{Radio}^{γ_{radio}'}$ for RLQs has better goodness of fit, relative to other models, which can be interpreted as this relation being preferred for RLQs. Meanwhile, we compare the results from flat-spectrum radio-loud quasars (FSRLQs) and steep-spectrum radio-loud quasars (SSRLQs), which indicate that their luminosity correlations are not exactly the same. We also consider dividing the RLQs sample into various redshift bins, which can be used to check if the X-ray luminosity relation depends on the redshift. Finally, we apply a combination of RLQs and SNla Pantheon to verify the nature of dark energy concerning whether or not its density deviates from the constant, and give the statistical results.
