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Title: Two-temperature GRRMHD Simulations of M87

Abstract

Here, we present axisymmetric two-temperature general relativistic radiation magnetohydrodynamic simulations of the inner region of the accretion flow onto the supermassive black hole M87. We address uncertainties from previous modeling efforts through inclusion of models for (1) self-consistent dissipative and Coulomb electron heating (2) radiation transport (3) frequency-dependent synchrotron emission, self-absorption, and Compton scattering. We adopt a distance D = 16.7 Mpc, an observer angle θ = 20°, and consider black hole masses M/M = (3.3 x 109, 6.2 x 109) and spins astar = (0.5, 0.9375) in a four-simulation suite. For each (M, astar), we identify the accretion rate that recovers the 230 GHz flux from very long baseline interferometry measurements. We report on disk thermodynamics at these accretion rates (M·/M·Edd ~ 10-5). The disk remains geometrically thick; cooling does not lead to a thin disk component. While electron heating is dominated by Coulomb rather than dissipation for r ≳ 10GM/c 2, the accretion disk remains two-temperature. Radiative cooling of electrons is not negligible, especially for r ≲ 10GM/c 2. The Compton y parameter is of order unity. We then compare derived and observed or inferred spectra, millimeter images, and jet powers. Simulations with M/M = 3.3 ×more » 109 are in conflict with observations. These simulations produce millimeter images that are too small, while the low-spin simulation also overproduces X-rays. For M/M = 6.2 x 109, both simulations agree with constraints on radio/IR/X-ray fluxes and millimeter image sizes. Simulation jet power is a factor 102–103 below inferred values, a possible consequence of the modest net magnetic flux in our models.« less

Authors:
ORCiD logo [1]; ORCiD logo [2];  [1]; ORCiD logo [3]; ORCiD logo [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of California, Berkeley, CA (United States). Dept. of Astronomy. Dept. of Physics. Theoretical Astrophysics Center
  3. Univ. of Illinois, Urbana, IL (United States). Dept. of Astronomy. Dept. of Physics
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of California, Berkeley, CA (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); LANL Laboratory Directed Research and Development (LDRD) Program; National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); Smithsonian Institution (United States); Simons Foundation (United States)
OSTI Identifier:
1479992
Report Number(s):
LA-UR-18-23675
Journal ID: ISSN 1538-4357
Grant/Contract Number:  
AC52-06NA25396; AST 13-33612; AST 1715054; ACI-1053575; TM7-18006X
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 864; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; accretion; accretion disks; magnetohydrodynamics (MHD); plasmas; radiation dynamics; radiative transfer; turbulence

Citation Formats

Ryan, Benjamin R., Ressler, Sean M., Dolence, Joshua C., Gammie, Charles, and Quataert, Eliot. Two-temperature GRRMHD Simulations of M87. United States: N. p., 2018. Web. doi:10.3847/1538-4357/aad73a.
Ryan, Benjamin R., Ressler, Sean M., Dolence, Joshua C., Gammie, Charles, & Quataert, Eliot. Two-temperature GRRMHD Simulations of M87. United States. https://doi.org/10.3847/1538-4357/aad73a
Ryan, Benjamin R., Ressler, Sean M., Dolence, Joshua C., Gammie, Charles, and Quataert, Eliot. Fri . "Two-temperature GRRMHD Simulations of M87". United States. https://doi.org/10.3847/1538-4357/aad73a. https://www.osti.gov/servlets/purl/1479992.
@article{osti_1479992,
title = {Two-temperature GRRMHD Simulations of M87},
author = {Ryan, Benjamin R. and Ressler, Sean M. and Dolence, Joshua C. and Gammie, Charles and Quataert, Eliot},
abstractNote = {Here, we present axisymmetric two-temperature general relativistic radiation magnetohydrodynamic simulations of the inner region of the accretion flow onto the supermassive black hole M87. We address uncertainties from previous modeling efforts through inclusion of models for (1) self-consistent dissipative and Coulomb electron heating (2) radiation transport (3) frequency-dependent synchrotron emission, self-absorption, and Compton scattering. We adopt a distance D = 16.7 Mpc, an observer angle θ = 20°, and consider black hole masses M/M⊙ = (3.3 x 109, 6.2 x 109) and spins astar = (0.5, 0.9375) in a four-simulation suite. For each (M, astar), we identify the accretion rate that recovers the 230 GHz flux from very long baseline interferometry measurements. We report on disk thermodynamics at these accretion rates (M·/M·Edd ~ 10-5). The disk remains geometrically thick; cooling does not lead to a thin disk component. While electron heating is dominated by Coulomb rather than dissipation for r ≳ 10GM/c 2, the accretion disk remains two-temperature. Radiative cooling of electrons is not negligible, especially for r ≲ 10GM/c 2. The Compton y parameter is of order unity. We then compare derived and observed or inferred spectra, millimeter images, and jet powers. Simulations with M/M ⊙ = 3.3 × 109 are in conflict with observations. These simulations produce millimeter images that are too small, while the low-spin simulation also overproduces X-rays. For M/M⊙ = 6.2 x 109, both simulations agree with constraints on radio/IR/X-ray fluxes and millimeter image sizes. Simulation jet power is a factor 102–103 below inferred values, a possible consequence of the modest net magnetic flux in our models.},
doi = {10.3847/1538-4357/aad73a},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 864,
place = {United States},
year = {Fri Sep 07 00:00:00 EDT 2018},
month = {Fri Sep 07 00:00:00 EDT 2018}
}

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Radially Extended, Stratified, Local Models of Isothermal Disks
text, January 2010


The Black-Hole Mass in M87 from Gemini/NIFS Adaptive Optics Observations
text, January 2011


Pair Production in Low Luminosity Galactic Nuclei
text, January 2011


The 2010 very high energy gamma-ray flare & 10 years of multi-wavelength observations of M 87
text, January 2011


M87 at metre wavelengths: the LOFAR picture
text, January 2012


Jet Launching Structure Resolved Near the Supermassive Black Hole in M87
text, January 2012


The central parsecs of M87: jet emission and an elusive accretion disc
text, January 2015


Strongly magnetized accretion discs require poloidal flux
text, January 2016


Magnetorotational Turbulence and Dynamo in a Collisionless Plasma
text, January 2016


Kinetic and radiative power from optically thin accretion flows
text, January 2017


Evolving Nonthermal Electrons in Simulations of Black Hole Accretion
text, January 2017


The Radiative Efficiency and Spectra of Slowly Accreting Black Holes from Two-Temperature GRRMHD Simulations
text, January 2017


Magnetically Driven Accretion Flows in the Kerr Metric I: Models and Overall Structure
text, January 2003


The Intrinsic Size of Sagittarius A* from 0.35 cm to 6 cm
text, January 2006


Thermal and Non-Thermal Infrared Emission from M87
text, January 2006


Simulating the Emission and Outflows from Accretion Disks
text, January 2007


Works referencing / citing this record:

Modeling non-thermal emission from the jet-launching region of M 87 with adaptive mesh refinement
journal, November 2019


Two-temperature, Magnetically Arrested Disc simulations of the jet from the supermassive black hole in M87
journal, April 2019

  • Chael, Andrew; Narayan, Ramesh; Johnson, Michael D.
  • Monthly Notices of the Royal Astronomical Society, Vol. 486, Issue 2
  • DOI: 10.1093/mnras/stz988

Neutrino emission from BL Lac objects: the role of radiatively inefficient accretion flows
journal, December 2018

  • Righi, C.; Tavecchio, F.; Inoue, S.
  • Monthly Notices of the Royal Astronomical Society: Letters, Vol. 483, Issue 1
  • DOI: 10.1093/mnrasl/sly231

Two-Temperature Magnetohydrodynamics Simulations of Propagation of Semi-Relativistic Jets
journal, January 2019


Electron and Proton Heating in Transrelativistic Guide Field Reconnection
journal, February 2019

  • Rowan, Michael E.; Sironi, Lorenzo; Narayan, Ramesh
  • The Astrophysical Journal, Vol. 873, Issue 1
  • DOI: 10.3847/1538-4357/ab03d7

A Resolution Study of Magnetically Arrested Disks
journal, April 2019

  • White, Christopher J.; Stone, James M.; Quataert, Eliot
  • The Astrophysical Journal, Vol. 874, Issue 2
  • DOI: 10.3847/1538-4357/ab0c0c

Radiative Properties of Magnetically Arrested Disks
journal, December 2019


The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project
journal, August 2019

  • Porth, Oliver; Chatterjee, Koushik; Narayan, Ramesh
  • The Astrophysical Journal Supplement Series, Vol. 243, Issue 2
  • DOI: 10.3847/1538-4365/ab29fd

First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
journal, April 2019

  • Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter
  • The Astrophysical Journal, Vol. 875, Issue 1
  • DOI: 10.3847/2041-8213/ab0f43

First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
journal, April 2019

  • Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter
  • The Astrophysical Journal, Vol. 875, Issue 1
  • DOI: 10.3847/2041-8213/ab1141

The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project
collection, January 2019

  • Porth, Oliver; Chatterjee, Koushik; Narayan, Ramesh
  • Maryland Shared Open Access Repository
  • DOI: 10.13016/m2htjg-wbul

Electron and Proton Heating in Transrelativistic Guide Field Reconnection
text, January 2019


The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project
text, January 2019


First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
text, January 2019