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arXiv 1102.2863astro-ph.HE
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余辉光变曲线的联机库

An on-line library of afterglow light curves

H. J. van Eerten, A. I. MacFadyen, W. Zhang

摘要:

伽马射线暴余辉喷流的数值研究揭示了与简化的解析模型的显著的定性差异。我们提出了一个在线图书馆的合成余辉光变曲线和宽带光谱用于解释观测数据。光变曲线已经计算了各种物理设置,如爆炸能量和环爆结构,以及不同的喷流参数和观测角度和红移。观测者的频率范围从低射电到X射线,观测者的时间从爆发后的几小时到几十年都进行了计算。的光变曲线已经计算出高分辨率的2D流体动力学模拟与RAM自适应网格细化代码和详细的同步辐射代码。该图书馆将包含通用的余辉模拟以及具体的案例研究,并将在http://cosmo.nyu.edu/afterglowlibrary上免费访问。合成光变曲线可以用来检查物理参数的准确性,这些物理参数是从分析模型拟合到余辉数据,定量地探索不同参数(如观察者角度)的后果,并准确预测未来的望远镜数据。

英文摘要:

Numerical studies of gamma-ray burst afterglow jets reveal significant qualitative differences with simplified analytical models. We present an on-line library of synthetic afterglow light curves and broadband spectra for use in interpreting observational data. Light curves have been calculated for various physics settings such as explosion energy and circumburst structure, as well as differing jet parameters and observer angle and redshift. Calculations gave been done for observer frequencies ranging from low radio to X-ray and for observer times from hours to decades after the burst. The light curves have been calculated from high-resolution 2D hydrodynamical simulations performed with the RAM adaptive-mesh refinement code and a detailed synchrotron radiation code. The library will contain both generic afterglow simulations as well as specific case studies and will be freely accessible at http://cosmo.nyu.edu/afterglowlibrary . The synthetic light curves can be used as a check on the accuracy of physical parameters derived from analytical model fits to afterglow data, to quantitatively explore the consequences of varying parameters such as observer angle and for accurate predictions of future telescope data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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