Swift测量中X射线与伽马射线数据之间的相关性
Correlation between X-ray and gamma data of Swift measurements
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中文总结 AI 辅助
本研究利用更大数据集和典型相关分析，发现伽马射线注量与X射线通量相关性最强，并首次揭示氢柱密度对整体相关性有显著贡献，可能暗示前身星抛射氢包层。
中文摘要 AI 辅助
过去二十年的多项研究使用典型相关分析（CCA）来研究伽马射线暴（GRBs）的主要伽马射线数据（如注量、峰值通量和持续时间）与主要X射线数据（通量、衰减指数、谱指数和氢柱密度）之间的关系。在本文中，我们使用更大的数据集重新审视这一方法，以识别这些关系中潜在的新见解。我们使用CCA来研究上述伽马射线和X射线参数之间的相互关系。利用导出的典型变量，我们计算了它们与原始数据的相关性（典型载荷）。与先前研究一致，分析显示伽马射线注量和X射线通量具有最强的相关性，而X射线衰减指数和谱指数的贡献较低。有趣的是，我们对更大数据集的分析揭示，氢柱密度对整体相关性有显著贡献。在长伽马射线暴的塌缩星模型背景下，这一发现可能被解释为表明前身星在伽马射线暴期间抛出了氢包层。
英文摘要
Several studies over the last two decades have used canonical correlation analysis (CCA) to study the relationships between main γ-ray (e.g. fluence, peak flux, and duration) and main X-ray (flux, decay and spectral index, and hydrogen column density) data from gamma-ray bursts (GRBs). In this paper, we revisit this approach using a much larger dataset to identify potential new insights into these relationships. We used CCA to investigate the interrelationship of the aforementioned gamma-ray and X-ray parameters. Using the derived canonical variables, we calculated their correlations (canonical loadings) with the original data. Consistently with previous research, the analysis revealed that gamma-ray fluence and X-ray flux have the strongest correlation, while the X-ray decay index and spectral index have a lower contribution. Interestingly, our analysis of a much larger dataset reveals that the HI column density makes a significant contribution to the overall correlation. This finding, in the context of the collapsar model for long GRBs, could be interpreted as an indication that the progenitor star ejected an HI envelope during the GRB.
发表机构
- University of Public Service（公共服务大学）
- HUN-REN Research Centre for Astronomy and Earth Sciences, Konkoly Thege Miklós Astronomical Institute（匈牙利科学院天文学与地球科学研究中心，孔科伊·捷尔吉·米克洛什天文研究所）
- Eötvös Loránd University, Faculty of Science, Institute of Physics and Astronomy, Department of Astronomy（罗兰大学，理学院，物理与天文学研究所，天文学系）
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