Variability in quasar light curves: using quasars as standard candles
Variability in quasar light curves: using quasars as standard candles
复制标题
类星体光变曲线的变化：使用类星体作为标准蜡烛
DOI：
10.1088/1475-7516/2022/04/060
复制
发表时间：
2022
影响因子：
6.4
通讯作者：
D. Stojkovic
中科院分区：
文献类型：
--
作者：
R. Solomon;D. Stojkovic
在 58 个经光谱证实的类星体的光变曲线中，以 0.15 dex 的色散测量了变分斜率 s F 与平均绝对星等 < M> 之间的关系。假设它一般适用于类星体，这种关系不仅增加了我们对类星体变化的工作知识，而且还显示出以独立于模型的方式精确测量到类星体的光度距离的巨大前景。对光度距离进行准确、独立于模型的测量将允许将类星体添加到宇宙距离阶梯中，轻松地将阶梯延伸到远远超出 Ia 型超新星可达到的红移范围，在那里可以更好地限制宇宙学参数。
A relation between the variational slope, s F, and the mean absolute magnitude,< M>, in the light curves of 58 spectroscopically confirmed quasars is measured with a dispersion of 0.15 dex. Assuming it holds for quasars in general, not only does this relation add to our working knowledge of quasar variability but it also shows great promise at accurately measuring luminosity distance to a quasar in a model independent way. An accurate, model independent measure of the luminosity distance would allow quasars to be added to the cosmic distance ladder, easily extending the ladder out far beyond the redshifts accessible to type Ia supernovae where cosmological parameters can be better constrained.