Amendola Luca, Marinucci Marco, Quartin Miguel
Institute of Theoretical Physics, Philosophenweg 16, Heidelberg University, 69120, Heidelberg, Germany.
Università degli Studi di Padova, Dipartimento di Fisica e Astronomia "G. Galilei," , via Marzolo 8, I-35131, Padova, Italy.
Phys Rev Lett. 2025 Mar 14;134(10):101004. doi: 10.1103/PhysRevLett.134.101004.
We propose a methodology to measure the cosmological spatial curvature by employing the deviation from statistical isotropy due to the Alcock-Paczyński effect of large scale galaxy clustering. This approach has a higher degree of model independence than most other proposed methods, being independent of the calibration of standard candles, rulers, or clocks, of the power spectrum shape (and thus also of the prerecombination physics), of the galaxy bias, of the theory of gravity, of the dark energy model, and of the background cosmology in general. We find that a combined Dark Energy Spectroscopic Instrument-Euclid galaxy survey can achieve ΔΩ_{k0}=0.057 at 1σ C.L. in the redshift range z<2 by combining power-spectrum and bispectrum measurements.
我们提出了一种方法，通过利用大规模星系团簇的阿尔科克-帕琴斯基效应导致的偏离统计各向同性来测量宇宙学空间曲率。与大多数其他提出的方法相比，这种方法具有更高程度的模型独立性，它独立于标准烛光、尺子或时钟的校准，独立于功率谱形状（因此也独立于复合前物理学），独立于星系偏差、引力理论、暗能量模型以及一般的背景宇宙学。我们发现，通过结合功率谱和双谱测量，在红移范围z<2内，联合暗能量光谱仪-欧几里得星系巡天在1σ置信水平下可实现ΔΩ_{k0}=0.057。
