论文标题
使用Quasar X射线和UV通量测量来限制宇宙模型参数
Using quasar X-ray and UV flux measurements to constrain cosmological model parameters
论文作者
论文摘要
Risaliti和Lusso在红移范围内编制了X射线和UV通量测量值1598级类星（QSO）$ 0.036 \ leq Z \ LEQ 5.1003 $，其中一部分是$ z \ sim \ sim 2.4-5.1 $，很大程度上是宇宙学上的主要无综合性。在本文中，我们单独使用这些QSO测量值，并与Baryon声学振荡（BAO）和Hubble参数[$ H（Z）$]测量值一起限制六个不同的宇宙学模型中的宇宙学参数，每个宇宙学模型都具有两个不同的Hubble常数恒定恒定固定率。在大多数这些模型中，鉴于较大的不确定性，QSO宇宙参数约束主要与$ H（z）$ + BAO数据的限制一致。一个有点重要的例外是非相关的物质密度参数$ω_{m0} $，其中QSO数据在大多数模型中有利于$ω__{M0} \ sim 0.5-0.6 $。因此，在与$ H（z）$ + BAO数据的QSO数据的联合分析中，一维$ω_{M0} $分布略微向更大的值转移。对QSO + $ H（Z）$ + BAO数据的联合分析与当前标准模型，即空间上的$λ$ CDM一致，但是轻度偏爱封闭的空间超曲面和动态的暗能量。 Since the higher $Ω_{m0}$ values favored by the QSO data appear to be associated with the $z \sim 2 - 5$ part of these data, and conflict somewhat with strong indications for $Ω_{m0} \sim 0.3$ from most $z < 2.5$ data as well as from the cosmic microwave background anisotropy data at $z \sim 1100$, in most models, the larger QSO data $ω_{m0} $可能比标准flat $λ$ cdm型号的$ z \ sim 2-5 $ qSO数据更能指示$ z \ sim 2-5 $ qSO数据的问题。
Risaliti and Lusso have compiled X-ray and UV flux measurements of 1598 quasars (QSOs) in the redshift range $0.036 \leq z \leq 5.1003$, part of which, $z \sim 2.4 - 5.1$, is largely cosmologically unprobed. In this paper we use these QSO measurements, alone and in conjunction with baryon acoustic oscillation (BAO) and Hubble parameter [$H(z)$] measurements, to constrain cosmological parameters in six different cosmological models, each with two different Hubble constant priors. In most of these models, given the larger uncertainties, the QSO cosmological parameter constraints are mostly consistent with those from the $H(z)$ + BAO data. A somewhat significant exception is the non-relativistic matter density parameter $Ω_{m0}$ where the QSO data favors $Ω_{m0} \sim 0.5 - 0.6$ in most models. Consequently in joint analyses of QSO data with $H(z)$ + BAO data the one-dimensional $Ω_{m0}$ distributions shift slightly toward larger values. A joint analysis of the QSO + $H(z)$ + BAO data is consistent with the current standard model, spatially-flat $Λ$CDM, but mildly favors closed spatial hypersurfaces and dynamical dark energy. Since the higher $Ω_{m0}$ values favored by the QSO data appear to be associated with the $z \sim 2 - 5$ part of these data, and conflict somewhat with strong indications for $Ω_{m0} \sim 0.3$ from most $z < 2.5$ data as well as from the cosmic microwave background anisotropy data at $z \sim 1100$, in most models, the larger QSO data $Ω_{m0}$ is possibly more indicative of an issue with the $z \sim 2 - 5$ QSO data than of an inadequacy of the standard flat $Λ$CDM model.
