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arXiv 2102.01292astro-ph.COgr-qchep-ph
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利用多信使和多波长观测策略通过直接测量宇宙膨胀历史探测暗能量的性质

Using a multi-messenger and multi-wavelength observational strategy to probe the nature of dark energy through direct measurements of cosmic expansion history

Jing-Zhao Qi, Shang-Jie Jin, Xi-Long Fan, Jing-Fei Zhang, Xin Zhang

摘要:

在不久的将来,在光学和无线电波段的红移漂移观测将提供精确的测量$H(z)$覆盖的$2<z<5$和$0<z<0.3$的红移范围。此外,引力波标准海妖观测可以测量光度距离的偶极各向异性,这也将提供$0<z<3$红移范围内的$H(z)$测量。在这项工作中,我们提出了一个多信使和多波长的观测策略来测量$H(z)$的基础上的三个下一代项目,E-ELT,SKA,和DECIGO,我们希望看到未来的$H(z)$的测量是否可以提供严格的限制暗能量参数。我们考虑的暗能量模型包括$Λ$ CDM、$w$ CDM、CPL、HDE和I $Λ$ CDM模型。结果表明,E-ELT、SKA 1和DECIGO在约束暗能量模型方面具有很强的互补性.虽然这三个数据集中的任何一个都只能对我们考虑的每个模型给出相当弱的约束,但它们的组合可以显著打破参数简并,并对几乎所有的宇宙学参数给出更严格的约束。此外,我们发现E-ELT,SKA 1,DECIGO和CMB的组合可以进一步改善对暗能量参数的约束,例如,CPL模型中的$σ(w_0)=0.024$和$σ(w_a)=0.17$,这意味着这三个有前途的探针将在帮助揭示暗能量的本质方面发挥关键作用。

英文摘要:

In the near future, the redshift drift observations in optical and radio bands will provide precise measurements on $H(z)$ covering the redshift ranges of $2<z<5$ and $0<z<0.3$. In addition, gravitational wave (GW) standard siren observations could make measurements on the dipole anisotropy of luminosity distance, which will also provide the $H(z)$ measurements in the redshift range of $0<z<3$. In this work, we propose a multi-messenger and multi-wavelength observational strategy to measure $H(z)$ based on the three next-generation projects, E-ELT, SKA, and DECIGO, and we wish to see whether the future $H(z)$ measurements could provide tight constraints on dark-energy parameters. The dark energy models we consider include $Λ$CDM, $w$CDM, CPL, HDE, and I$Λ$CDM models. It is found that E-ELT, SKA1, and DECIGO are highly complementary in constraining dark energy models. Although any one of these three data sets can only give rather weak constraints on each model we consider, the combination of them could significantly break the parameter degeneracies and give much tighter constraints on almost all the cosmological parameters. Moreover, we find that the combination of E-ELT, SKA1, DECIGO, and CMB could further improve the constraints on dark energy parameters, e.g., $σ(w_0)=0.024$ and $σ(w_a)=0.17$ in the CPL model, which means that these three promising probes will play a key role in helping reveal the nature of dark energy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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