Gamma ray burst constraints on cosmological models from the improved Amati correlation

Abstract

An improved Amati correlation was constructed in (ApJ 931 (2022) 50) by us recently. In this paper, we further study constraints on the $\Lambda$CDM and $w$CDM models from the gamma ray bursts (GRBs) standardized with the standard and improved Amati correlations, respectively. By using the Pantheon type Ia supernova sample to calibrate the latest A220 GRB data set, the GRB Hubble diagram is obtained model-independently. We find that at the high redshift region ($z>1.4$) the GRB distance modulus from the improved Amati correlation is larger apparently than that from the standard Amati one. The GRB data from the standard Amati correlation only give a lower bound limit on the present matter density parameter ${\Omega }_{m0}$, while the GRBs from the improved Amati correlation constrain the ${\Omega }_{m0}$ with the $68\%$ confidence level to be $0.308_{-0.230}^{+0.066}$ and $0.307_{-0.290}^{+0.057}$ in the $\Lambda$CDM and $w$CDM models, respectively, which are consistent very well with those given by other current popular observational data including BAO, CMB and so on. Once the $H(z)$ data are added in our analysis, the constraint on the Hubble constant $H_0$ can be achieved. We find that two different correlations provide slightly different $H_0$ results but the marginalized mean values seem to be close to that from the Planck 2018 CMB observations.

10 pages, 4 figures, 2 tables. Accepted for publication in ApJ

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• The Gamma-ray Bursts fundamental plane correlation as a cosmological tool
• $E_{\mathrm{iso}}$-$E_{\mathrm{p}}$ correlation of gamma ray bursts: calibration and cosmological applications
• Redshift-evolutionary X-ray and UV luminosity relation of quasars from Gaussian copula
• Constraining Coupling Constants' Variation with Supernovae, Quasars, and GRBs
• Intermediate redshift calibration of Gamma-ray Bursts and cosmic constraints in non-flat cosmology