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arXiv 2403.06111astro-ph.HE
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通过Mkn 501的宽带SED建模估算不同粒子分布下的喷流功率

Estimating the Jet Power from Broadband SED modeling of Mkn 501 for different particle distributions

Hritwik Bora, Rukaiya Khatoon, Ranjeev Misra, Rupjyoti Gogoi

AI总结:

本研究利用多波段观测数据拟合高能峰耀变体Mkn 501的宽带光谱,发现不同粒子能量分布下喷流功率差异显著,内禀曲率分布对应的低喷流功率支持喷流由吸积过程供能的观点。

摘要:

我们利用2013年至2022年间的Swift-XRT/UVOT、NuSTAR以及Fermi-LAT观测数据,研究了高能峰(HBL)耀变体Mkn 501的宽带光谱能量分布。我们采用单区轻子模型对光谱进行拟合,该模型考虑了来自不同粒子能量分布的同步辐射和同步自康普顿发射,这些分布包括拐折幂律分布、对数抛物线分布,以及扩散或加速时标随能量变化时预期的分布。对于拐折幂律分布,当最小电子能量γ_min约为10(10^3)时,估算得到的喷流功率约为10^47(10^44) erg s^-1。然而,对于具有内禀曲率的电子能量分布(例如对数抛物线形式),喷流功率显著更低,仅为几倍10^42 erg s^-1,相当于10^7 M⊙黑洞爱丁顿光度的百分之几,这表明喷流可能由吸积过程供能。我们讨论了这些结果的启示。

英文摘要:

We consider the broadband spectral energy distribution of the high energy peaked (HBL) blazar Mkn 501 using $\textit{Swift}$-XRT/UVOT, NuSTAR and $\textit{Fermi}$-LAT observations taken between 2013 and 2022. The spectra were fitted with a one-zone leptonic model using synchrotron and synchrotron self-Compton emission from different particle energy distributions such as a broken power-law, log-parabola, as well as distributions expected when the diffusion or the acceleration time scale are energy dependent. The jet power estimated for a broken power-law distribution was $ \sim 10^{47} (10^{44})$ erg s$^{-1}$ for a minimum electron energy $γ_\text{min} \sim 10 (10^3)$. However, for electron energy distributions with intrinsic curvature (such as the log-parabola form), the jet power is significantly lower at a few times $ 10^{42}$ erg s$^{-1}$ which is a few percent of the Eddington luminosity of a $10^7$ M$_\odot$ black hole, suggesting that the jet may be powered by accretion processes. We discuss the implications of these results.

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