Cao Shulei, Dainotti Maria, Ratra Bharat
Department of Physics, Kansas State University, 116 Cardwell Hall, Manhattan, KS 66506, USA.
National Astronomical Observatory of Japan, 2-21-1 Osawa, Tokyo 181-8588, Japan.
Mon Not R Astron Soc. 2022 Feb 24;512(1):439-454. doi: 10.1093/mnras/stac517. eCollection 2022 May.
We show that the Platinum gamma-ray burst (GRB) data compilation, probing the redshift range 0.553 ≤ ≤ 5.0, obeys a cosmological-model-independent three-parameter Fundamental Plane (Dainotti) correlation and so is standardizable. While they probe the largely unexplored ∼ 2.3-5 part of cosmological redshift space, the GRB cosmological parameter constraints are consistent with, but less precise than, those from a combination of baryon acoustic oscillation (BAO) and Hubble parameter [()] data. In order to increase the precision of GRB-only cosmological constraints, we exclude common GRBs from the larger Amati-correlated A118 data set composed of 118 GRBs and jointly analyse the remaining 101 Amati-correlated GRBs with the 50 Platinum GRBs. This joint 151 GRB data set probes the largely unexplored ∼ 2.3-8.2 region; the resulting GRB-only cosmological constraints are more restrictive, and consistent with, but less precise than, those from () + BAO data.
我们表明，探测红移范围为0.553≤z≤5.0的铂伽马射线暴（GRB）数据汇编符合与宇宙学模型无关的三参数基本平面（达伊诺蒂）相关性，因此是可标准化的。虽然它们探测了宇宙学红移空间中很大程度上未被探索的z ∼ 2.3 - 5部分，但GRB宇宙学参数约束与重子声学振荡（BAO）和哈勃参数[H(z)]数据组合得到的约束一致，但精度较低。为了提高仅基于GRB的宇宙学约束的精度，我们从由118个GRB组成的较大的与阿马蒂相关的A118数据集中排除常见的GRB，并将其余101个与阿马蒂相关的GRB与50个铂GRB联合分析。这个由151个GRB组成的联合数据集探测了很大程度上未被探索的z ∼ 2.3 - 8.2区域；由此得到的仅基于GRB的宇宙学约束更具限制性，与H(z)+BAO数据得到的约束一致，但精度较低。
