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 Aug 1;516(1):1386-1405. doi: 10.1093/mnras/stac2170. eCollection 2022 Oct.
Gamma-ray bursts (GRBs), observed to redshift = 9.4, are potential probes of the largely unexplored ∼ 2.7-9.4 part of the early Universe. Thus, finding relevant relations among GRB physical properties is crucial. We find that the Platinum GRB data compilation, with 50 long GRBs (with relatively flat plateaus and no flares) in the redshift range 0.553 ≤ ≤ 5.0, and the LGRB95 data compilation, with 95 long GRBs in 0.297 ≤ ≤ 9.4, as well as the 145 GRB combination of the two, strongly favour the 3D Fundamental Plane (Dainotti) correlation (between the peak prompt luminosity, the luminosity at the end of the plateau emission, and its rest-frame duration) over the 2D one (between the luminosity at the end of the plateau emission and its duration). The 3D Dainotti correlations in the three data sets are standardizable. We find that while LGRB95 data have ∼50 per cent larger intrinsic scatter parameter values than the better-quality Platinum data, they provide somewhat tighter constraints on cosmological-model and GRB-correlation parameters, perhaps solely due to the larger number of data points, 95 versus 50. This suggests that when compiling GRB data for the purpose of constraining cosmological parameters, given the quality of current GRB data, intrinsic scatter parameter reduction must be balanced against reduced sample size.
伽马射线暴（GRBs）的红移观测值高达(z = 9.4)，是探索早期宇宙中大部分未被研究的(z\sim2.7 - 9.4)部分的潜在探针。因此，找到伽马射线暴物理性质之间的相关关系至关重要。我们发现，红移范围在(0.553\leq z\leq5.0)的50个长伽马射线暴（具有相对平坦的平台期且无耀斑）的白金伽马射线暴数据汇编、红移范围在(0.297\leq z\leq9.4)的95个长伽马射线暴的LGRB95数据汇编，以及两者的145个伽马射线暴组合，强烈支持三维基本平面（达伊诺蒂）相关性（在峰值瞬时光度、平台期发射结束时的光度及其静止系持续时间之间），而非二维相关性（在平台期发射结束时的光度及其持续时间之间）。这三个数据集中的三维达伊诺蒂相关性是可标准化的。我们发现，虽然LGRB95数据的固有散射参数值比质量更好的白金数据大约大50%，但它们对宇宙学模型和伽马射线暴相关性参数提供了更严格的限制，这可能仅仅是因为数据点数量更多，分别是95个和50个。这表明，在为约束宇宙学参数而汇编伽马射线暴数据时，考虑到当前伽马射线暴数据的质量，必须在减少固有散射参数和减小样本量之间进行权衡。
