论文标题
美元
$E_{\mathrm{iso}}$-$E_{\mathrm{p}}$ correlation of gamma ray bursts: calibration and cosmological applications
论文作者
论文摘要
伽马射线爆发（GRB）是最爆炸性的现象，可用于研究宇宙的扩张。在本文中，我们为$ e _ {\ mathrm {iso}} $ - $ e _ {\ mathrm {p}} $相关性的$ e _ {\ mathrm {iso}} $ - $ e _ {\ mathrm {iso}} $相关性编译了一个长的GRB样本。该样品包含221个长速度，红移从0.03到8.20。从不同红移间隔的数据分析中，我们没有发现这种相关性的红移演化具有统计学上的显着证据。然后，我们校准六个子样本中的相关性，并使用校准的相关性来限制宇宙学参数。我们采用一种方面的方法研究了状态（EOS）的暗能量方程的红移演变，并发现EOS倾向于在低红移时振荡，但与高红移的$ -1 $一致。它暗示了低红移时的动态暗能量为$2σ$的置信度。
Gamma-ray bursts (GRBs) are the most explosive phenomena and can be used to study the expansion of Universe. In this paper, we compile a long GRB sample for the $E_{\mathrm{iso}}$-$E_{\mathrm{p}}$ correlation from Swift and Fermi observations. The sample contains 221 long GRBs with redshifts from 0.03 to 8.20. From the analysis of data in different redshift intervals, we find no statistically significant evidence for the redshift evolution of this correlation. Then we calibrate the correlation in six sub-samples and use the calibrated one to constrain cosmological parameters. Employing a piece-wise approach, we study the redshift evolution of dark energy equation of state (EOS), and find that the EOS tends to be oscillating at low redshift, but consistent with $-1$ at high redshift. It hints a dynamical dark energy at $2σ$ confidence level at low redshift.
