Speaker
Description
We carry out three-dimensional radiation-relativistic magnetohydrodynamic (3D Rad-RMHD) simulations of accretion flows around spinning active galactic nuclei (AGNs). Our study focuses on the magnetically arrested disk (MAD) state, utilizing a single-temperature model that incorporates bremsstrahlung opacity as the sole radiation process while varying the black hole spin from non-spinning to rapidly spinning cases. Our findings indicate that the MAD state persists across all spin values, as evidenced by the normalized magnetic flux at the event horizon and the spatially averaged plasma beta. The overall flow dynamics remain qualitatively similar for all spin models in 3D simulations, suggesting that black hole spin has minimal impact on the accretion dynamics. Additionally, we conduct post-processing using a two-temperature model to calculate the luminosities from synchrotron and bremsstrahlung radiation. We discover that the total radiation luminosity is significantly higher than the luminosities from either synchrotron or bremsstrahlung alone. This result emphasizes the role of radiation in influencing the dynamics of the accretion flow. Our analysis reveals that the electron temperature is notably high in the jet region, regardless of the spin value. Furthermore, we observe that the temporal evolution of both radiative and synchrotron luminosities exhibits qualitatively similar behavior across all spin values. In conclusion, our results suggest that black hole spin has a minimal effect on the spectral energy distribution (SED) in MAD state accretion flows.
| Participate the oral/poster presentation award competition | No |
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