论文标题
确定用于约束宇宙模型参数的类星体X射线和UV通量测量的有效性范围
Determining the range of validity of quasar X-ray and UV flux measurements for constraining cosmological model parameters
论文作者
论文摘要
我们使用六种不同的宇宙学模型来研究2038类品牌（QSO）的X射线和紫外线测量值最近发行的汇编，这些测量范围跨越了红移范围$ 0.009 \ leq Z \ leq Z \ leq 7.5413 $。我们发现，对于完整的QSO数据集，X射线和UV仪表的参数$ l_x-l_ {uv} $用于标准化这些QSO的关系取决于用于确定这些参数的宇宙学模型，即，即使完整的QSO数据集似乎不标准化，因此无法用于cosmodical参数的QSO数据集。 QSO数据的子集仅限于红移$ z \ Lessim 1.5-1.7 $ ofey of $ l_x-l_ {uv} $以宇宙学模型独立的方式遵守，因此可以用于限制宇宙学参数。这些较低的$ z $，较小的QSO数据子集的宇宙学约束主要与BARYON声学振荡和哈勃参数测量值相一致，但要弱得多。
We use six different cosmological models to study the recently-released compilation of X-ray and UV flux measurements of 2038 quasars (QSOs) which span the redshift range $0.009 \leq z \leq 7.5413$. We find, for the full QSO data set, that the parameters of the X-ray and UV luminosities $L_X-L_{UV}$ relation used to standardized these QSOs depend on the cosmological model used to determine these parameters, i.e, it appears that the full QSO data set include QSOs that are not standardized and so cannot be used for the purpose of constraining cosmological parameters. Subsets of the QSO data, restricted to redshifts $z \lesssim 1.5-1.7$ obey the $L_X-L_{UV}$ relation in a cosmological-model-independent manner, and so can be used to constrain cosmological parameters. The cosmological constraints from these lower-$z$, smaller QSO data subsets are mostly consistent with, but significantly weaker than, those that follow from baryon acoustic oscillation and Hubble parameter measurements.
