典型文献
High-precision Measurements of Cosmic Curvature from Gravitational Wave and Cosmic Chronometer Observations
文献摘要：
Although the spatial curvature has been measured with very high precision, it still suffers from the well-known cosmic curvature tension. In this paper, we use an improved method to determine the cosmic curvature, by using the simulated data of binary neutron star mergers observed by the second generation space-based DECi-hertz Interferometer Gravitational-wave Observatory (DECIGO). By applying the Hubble parameter observations of cosmic chronometers to the DECIGO standard sirens, we explore different possibilities of making measurements of the cosmic curvature referring to a distant past:one is to reconstruct the Hubble parameters through the Gaussian process without the influence of hypothetical models, and the other is deriving constraints onΩK in the framework of the non-flat Λ cold dark matter model. It is shown that in the improved method DECIGO could provide a reliable and stringent constraint on the cosmic curvature (ΩK=?0.007 ± 0.016), while we could only expect the zero cosmic curvature to be established at the precision ofΔΩK=0.11 in the second model-dependent method. Therefore, our results indicate that in the framework of methodology proposed in this paper, the increasing number of well-measured standard sirens in DECIGO could significantly reduce the bias of estimations for cosmic curvature. Such a constraint is also comparable to the precision of Planck 2018 results with the newest cosmic microwave background (CMB) observations (ΔΩK≈0.018), based on the concordanceΛCDM model.
文献关键词：
中图分类号：
作者姓名：
Yuan He;Yu Pan;Dong-Ping Shi;Jin Li;Shuo Cao;Wei Cheng
作者机构：
School of Science,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics,Chongqing University,Chongqing 401331,China;School of Electronic and Electrical Engineering,Chongqing University of Arts and Sciences,Chongqing 402160,China;Department of Astronomy,Beijing Normal University,Beijing 100875,China
文献出处：
引用格式：
[1]Yuan He;Yu Pan;Dong-Ping Shi;Jin Li;Shuo Cao;Wei Cheng-.High-precision Measurements of Cosmic Curvature from Gravitational Wave and Cosmic Chronometer Observations)[J].天文和天体物理学研究,2022(08):198-205
A类：
Chronometer,DECi,DECIGO,chronometers
B类：
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AB值：
0.534421
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