- evn2024@mpifr.de
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Contribution
Numerical simulations and radiative signatures of transient and episodic jets
Speakers
- Dr. Christian FROMM
Primary authors
- Dr. Christian FROMM (JMU Wuerzburg)
Co-authors
- Prof. Yosuke MIZUNO (Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, China)
- Dr. Ziri YOUNSI (University College London, London, UK)
Content
Observations of transient and episodic jets allow us to study jet formation and particle acceleration in real time. To better understand the possible physics behind these violent events we perform two-temperature 3D GRMHD simulations of accreting black holes. Our simulations start with an initial torus in hydrostatic equilibrium seeded with a magnetic field with alternating polarity. During the accretion process we trigger magnetic reconnection which leads to three distinct flow states: (i) an intermittent flow that passes from quiescent states to a flaring state, (ii) a quasi-steady-state with no jet, and (iii) an accretion state similar to a magnetically arrested configuration including a strong jet. In addition, our simulations lead to the formation of current sheets which provide ideal conditions for the acceleration of non-thermal particles. From the GRMHD simulations we compute the polarised radiative transfer including light curves, broad-band spectra, radio images a various frequencies and polarisation fractions. Finally our results can be compared to current and future observation of SgrA* or black hole binaries.