Bjet_MCMC:一个自动拟合耀变体宽波段SED的新工具
Bjet_MCMC: A new tool to automatically fit the broadband SEDs of blazars
AI总结:
本文发布了新工具Bjet_MCMC,用于自动拟合耀变体宽波段光谱能量分布,支持测试轻子同步自康普顿模型及外部逆康普顿过程,具备高效并行计算能力。
摘要:
多波段观测现已成为研究耀变体各种活动状态、对其进行分类以及确定驱动其辐射的可能潜在物理过程的常规手段。宽波段辐射模型已成为测试辐射场景并为磁场强度、多普勒因子或辐射区的粒子分布形状等物理量设定数值不可或缺的工具。我们在此宣布首次公开发布一款新工具Bjet_MCMC,该工具能够自动拟合耀变体的宽波段光谱能量分布(SEDs)。完整代码可在GitHub上获取,允许测试轻子同步自康普顿模型(SSC),包括是否包含来自超大质量黑洞热环境(吸积盘和宽线区)的外部逆康普顿过程。该代码设计为用户友好且计算高效。它包含一个用C++编写的核心和一个完全并行化的SED拟合方法。Bjet的原始多SSC区模型也可在GitHub上获取,但目前未包含在MCMC拟合过程中。我们介绍了Bjet_MCMC的特性、性能和结果,以及用户建议。
英文摘要:
Multiwavelength observations are now the norm for studying blazars' various states of activity, classifying them, and determining possible underlying physical processes driving their emission. Broadband emission models became unavoidable tools for testing emission scenarios and setting values to physical quantities such as the magnetic field strength, Doppler factor, or shape of the particle distribution of the emission zone(s). We announce here the first public release of a new tool, Bjet_MCMC, that can automatically fit broadband spectral energy distributions (SEDs) of blazars. The complete code is available on GitHub and allows testing leptonic synchrotron self-Compton models (SSC), with or without external inverse-Compton processes from the thermal environment of supermassive black holes (accretion disk and broad line region). The code is designed to be user-friendly and computationally efficient. It contains a core written in C++ and a fully parallelized SED fitting method. The original multi-SSC zones model of Bjet is also available on GitHub but is not included in the MCMC fitting process at the moment. We present the features, performance, and results of Bjet_MCMC, as well as user advice.
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