Radiation GRMHD simulations of M87: funnel properties and prospects for gap acceleration

Abstract

We use the public code ebhlight to carry out 3D radiative general relativistic magnetohydrodynamics (GRMHD) simulations of accretion onto the supermassive black hole in M87. The simulations self-consistently evolve a frequency-dependent Monte Carlo description of the radiation field produced by the accretion flow. We explore two limits of accumulated magnetic flux at the black hole (SANE and MAD), each coupled to several sub-grid prescriptions for electron heating that are motivated by models of turbulence and magnetic reconnection. We present convergence studies for the radiation field and study its properties. We find that the near-horizon photon energy density is an order of magnitude higher than is predicted by simple isotropic estimates from the observed luminosity. The radially dependent photon momentum distribution is anisotropic and can be modeled by a set of point-sources near the equatorial plane. We draw properties of the radiation and magnetic field from the simulation and feed them into an analytic model of gap acceleration to estimate the very high energy (VHE) gamma-ray luminosity from the magnetized jet funnel, assuming that a gap is able to form. We find luminosities of $\sim 10^{41}\mathrm{erg}{\mathrm{s}}^{-1}$ for MAD models and $\sim 2\times 10^{40}\mathrm{erg}{\mathrm{s}}^{-1}$ for SANE models, which are comparable to measurements of M87's VHE flares. The time-dependence seen in our calculations is insufficient to explain the flaring behavior. Our results provide a step towards bridging theoretical models of near-horizon properties seen in black hole images with the VHE activity of M87.

arXiv comment16 pages, 17 figures, Accepted for publication by MNRAS

References in corpus (51)

• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
• First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
• Efficient Generation of Jets from Magnetically Arrested Accretion on a Rapidly Spinning Black Hole
• General Relativistic Magnetohydrodynamic Simulations of Magnetically Choked Accretion Flows around Black Holes
• HARM: A Numerical Scheme for General Relativistic Magnetohydrodynamics
• GRMHD Simulations of Magnetized Advection Dominated Accretion on a Non-Spinning Black Hole: Role of Outflows
• The Black-Hole Mass in M87 from Gemini/NIFS Adaptive Optics Observations
• Jet Launching Structure Resolved Near the Supermassive Black Hole in M87
• Formation of Precessing Jets by Tilted Black-hole Discs in 3D General Relativistic MHD Simulations
• Magnetically Driven Accretion Flows in the Kerr Metric I: Models and Overall Structure
• The Structure and Dynamics of the Sub-parsec Scale Jet in M87 Based on 50 VLBA Observations Over 17 Years at 43 GHz
• The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project
• Fast variability of TeV gamma-rays from the radio galaxy M 87
• General relativistic magnetohydrodynamical simulations of the jet in M87
• Primitive Variable Solvers for Conservative General Relativistic Magnetohydrodynamics
• Accretion onto the Supermassive Black Hole in M87
• Radio Imaging of the Very-High-Energy Gamma-Ray Emission Region in the Central Engine of a Radio Galaxy
• Non-thermal particle acceleration in collisionless relativistic electron-proton reconnection
• Equation of State in Relativistic Magnetohydrodynamics: variable versus constant adiabatic index
• The `quiescent' black hole in M87
• The 2010 very high energy gamma-ray flare & 10 years of multi-wavelength observations of M 87
• Full Transport Model of GW170817-Like Disk Produces a Blue Kilonova
• A prescription for the turbulent heating of astrophysical plasmas
• Two-temperature, Magnetically Arrested Disc simulations of the jet from the supermassive black hole in M87
• The size of the jet launching region in M87
• The central parsecs of M87: jet emission and an elusive accretion disc
• Variable TeV emission as a manifestation of jet formation in M87?
• The Disc-Jet Symbiosis Emerges: Modeling the Emission of Sagittarius A* with Electron Thermodynamics
• Thermal disequilibration of ions and electrons by collisionless plasma turbulence
• Measuring Mass Accretion Rate onto the Supermassive Black Hole in M 87 Using Faraday Rotation Measure with the Submillimeter Array
• Electron and proton heating in trans-relativistic magnetic reconnection
• 230 GHz VLBI observations of M87: event-horizon-scale structure at the enhanced very-high-energy $\gamma$-ray state in 2012
• Horizon-Scale Lepton Acceleration in Jets: Explaining the Compact Radio Emission in M87
• Pair Production in Low Luminosity Galactic Nuclei
• Modeling non-thermal emission from the jet-launching region of M 87 with adaptive mesh refinement
• Multi-dimensional simulations of ergospheric pair discharges around black holes
• Two-Temperature GRRMHD Simulations of M87
• GRMHD simulations of accretion onto Sgr A*: How important are radiative losses?
• Particle-in-cell simulations of pair discharges in a starved magnetosphere of a Kerr black hole
• The Radiative Efficiency and Spectra of Slowly Accreting Black Holes from Two-Temperature GRRMHD Simulations
• A parameter survey of Sgr A* radiative models from GRMHD simulations with self-consistent electron heating
• Monitoring the Morphology of M87* in 2009-2017 with the Event Horizon Telescope
• Self-consistent spectra from radiative GRMHD simulations of accretion onto Sgr A*
• Physics of Pair Producing Gaps in Black Hole Magnetospheres II -- General Relativity
• Kinematics and Dynamics of Multiphase Outflows in Simulations of the Star-Forming Galactic ISM
• Physics of Pair Producing Gaps in Black Hole Magnetospheres
• Comprehensive analysis of magnetospheric gaps around Kerr black holes using 1D GRPIC simulations
• Pair Drizzle around Sub-Eddington Supermassive Black Holes
• Bremsstrahlung in GRMHD models of accreting black holes
• Gap-type Particle Acceleration in the Magnetospheres of Rotating Supermassive Black Holes

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• Jets in Magnetically Arrested Hot Accretion Flows: Geometry, Power and Black Hole Spindown
• Radiative reconnection-powered TeV flares from the black hole magnetosphere in M87
• Radiation GRMHD Simulations of the Hard State of Black Hole X-ray Binaries and the Collapse of a Hot Accretion Flow
• GRMHD Simulations and Modeling for Jet Formation and Acceleration Region in AGNs
• Temperature properties in magnetised and radiatively cooled two-temperature accretion flows onto a black hole
• Survey of Radiative, Two-Temperature Magnetically Arrested Simulations of the Black Hole M87* I: Turbulent Electron Heating
• Synchrotron Pair Production Equilibrium in Relativistic Magnetic Reconnection
• Physics of Pair Producing Gaps in Black Hole Magnetospheres: Two Dimensional General Relativistic Particle-in-cell Simulations
• Deep learning inference with the Event Horizon Telescope II. The Zingularity framework for Bayesian artificial neural networks
• Double flows anchored in a Kerr black hole horizon. I. Meridionally self-similar MHD models with loading terms
• PATOKA: Simulating Electromagnetic Observables of Black Hole Accretion