THE QSO VARIABILITY-LUMINOSITY-REDSHIFT RELATION
THE QSO VARIABILITY-LUMINOSITY-REDSHIFT RELATION
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DOI：
10.1093/mnras/282.4.1191
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发表时间：
1996-08
影响因子：
4.8
通讯作者：
R. C. Fernandes;I. Aretxaga;R. T. D. D. F. -. Ufsc-R.-T.-D.-D.-F.-.-Ufsc-102575285;Florianópolis;Brazil Royal Greenwich Observatory;
中科院分区：
文献类型：
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作者：
R. C. Fernandes;I. Aretxaga;R. T. D. D. F. -. Ufsc-R.-T.-D.-D.-F.-.-Ufsc-102575285;Florianópolis;Brazil Royal Greenwich Observatory;
在南银河系极类星体样本的变化，光度和红移之间的关系进行检查，努力解开光度和红移的光学变化的幅度的影响。证实了其他作者所发现的光变率与光度之间的线性关系。我们的分析也支持这样的说法，即可变性随红移而增加，很可能是由于可变性和波长之间的关系。特别是，我们的参数拟合表明，类星体的光变波长的关系是一致的低光度附近的活动星系核观察。结果被用来约束泊松型模型。我们发现，如果类星体的变化是由随机叠加的脉冲，那么个别事件必须有B波段的能量之间的$\sim 10^{50}$和几倍$10^{51}$尔格和时间尺度的$\sim 2$ yr。本文还讨论了广义泊松模型中脉冲能量和寿命随光度的变化。
The relationship between variability, luminosity and redshift in the South Galactic Pole QSO sample is examined in an effort to disentangle the effects of luminosity and redshift in the amplitude of the optical variations. The anticorrelation between variability and luminosity found by other authors is confirmed. Our analysis also supports claims that variability increases with redshift, most likely due to an anticorrelation between variability and wavelength. In particular, our parametric fits show that the QSO variability-wavelength relation is consistent with that observed in low-luminosity nearby active galactic nuclei. The results are used to constrain Poissonian-type models. We find that if QSO variability results from a random superposition of pulses, then the individual events must have B-band energies between $\sim 10^{50}$ and a few times $10^{51}$ erg and time-scales of $\sim 2$ yr. Generalized Poissonian models in which the pulse energy and lifetime scale with luminosity are also discussed.