Radiative energy from a reconnection region around massive black hole

Abstract

In the previous numerical study, we find the blob formation and ejection in the presence of magnetic reconnection in the environment of the hot flow of the accretion disk. Based on those encouraging results, in the present work, we calculate the energy and the spectrum of the emission in the different bands around Sgr A*. We assume the electrons in the magnetic reconnection region are non-thermal and emits synchrotron radiation. The electrons in the other region are thermal, which follows the thermal distribution, and the thermal electron emission mechanism is thermal synchrotron radiation. During the whole process of the magnetic evolution and reconnection, we find two peaks in the temporal light curve in the recently observed Radio frequencies (230 GHz and 43 GHz) and NIR wavelengths. Although, the light curve of the NIR band is most prominent in a single peak. The first peak appears because of the blob in the plasma flow, which is formed due to the magnetic reconnection. The second peak appears due to the production of the non-thermal electrons with the evolution of the magnetic flux. Both peaks reach luminosity more than 1026 erg/s for a single plasmoid/blob. For the NIR band, the highest luminosity can reach more than 1028 erg/s. These luminosities can be high for the large simulation area and the stronger magnetic field with the multiple blobs. We infer that the observed flares are a group of magnetic reconnection phenomena, not a single one.

References in corpus (50)

• Hot Accretion Flows Around Black Holes
• The Galactic Center Massive Black Hole and Nuclear Star Cluster
• Chandra X-ray Spectroscopic Imaging of Sgr A* and the Central Parsec of the Galaxy
• Nonthermal Electrons in Radiatively Inefficient Accretion Flow Models of Sagittarius A*
• Detection of orbital motions near the last stable circular orbit of the massive black hole SgrA*
• Advection-Dominated Accretion Model of Sagittarius A*: Evidence for a Black Hole at the Galactic Center
• The Generation of Nonthermal Particles in the Relativistic Magnetic Reconnection of Pair Plasmas
• A Jet-ADAF model for Sgr A*
• The Proper Motion of SgrA*: I. First VLBA Results
• Broad-band X-ray/gamma-ray spectra and binary parameters of GX 339-4 and their astrophysical implications
• A public code for general relativistic, polarised radiative transfer around spinning black holes
• On The Nature of the Variable Infrared Emission from Sgr A*
• Plasmoids in relativistic reconnection, from birth to adulthood: first they grow, then they go
• Flaring Activity of Sgr A* at 43 and 22 GHz: Evidence for Expanding Hot Plasma
• Electron and Proton Acceleration in Trans-Relativistic Magnetic Reconnection: Dependence on Plasma Beta and Magnetization
• A Magnetohydrodynamic Model for the Formation of Episodic Jets
• The Disc-Jet Symbiosis Emerges: Modeling the Emission of Sagittarius A* with Electron Thermodynamics
• Harmony in Electrons: Cyclotron and Synchrotron Emission by Thermal Electrons in a Magnetic Field
• Flares in the Galactic center I: orbiting flux tubes in Magnetically Arrested Black Hole Accretion Disks
• A powerful flare from Sgr A* confirms the synchrotron nature of the X-ray emission
• Radio and Millimeter Monitoring of Sgr A*: Spectrum, Variability, and Constraints on the G2 Encounter
• GRay: a Massively Parallel GPU-Based Code for Ray Tracing in Relativistic Spacetimes
• Sgr A* near-infrared flares from reconnection events in a magnetically arrested disc
• Variability Timescale and Spectral Index of Sgr A* in the Near Infrared: Approximate Bayesian Computation Analysis of the Variability of the Closest Supermassive Black Hole
• Plasmoid formation in global GRMHD simulations and AGN flares
• Proper Motion of the Compact, Nonthermal Radio Source in the Galactic Center, Sagittarius a*
• Thermal synchrotron radiation and its Comptonization in compact X-ray sources
• Time Dependent Models of Flares from Sagittarius A*
• Particle Acceleration and the Origin of X-ray Flares in GRMHD simulations of Sgr A*
• An 8 hour characteristic time-scale in submillimetre light curves of Sagittarius A*
• Fast Variability and mm/IR flares in GRMHD Models of Sgr A* from Strong-Field Gravitational Lensing
• Blob formation and ejection in coronal jets due to the plasmoid and Kelvin-Helmholtz instabilities
• ALMA and VLA measurements of frequency-dependent time lags in Sagittarius A*: evidence for a relativistic outflow
• The Flux Distribution of Sgr A*
• Magnetically Modified Spherical Accretion in GRMHD: Reconnection-Driven Convection and Jet Propagation
• ALMA Observations of the Terahertz Spectrum of Sagittarius A*
• A Plasmoid Model for the Sgr A* Flares Observed with GRAVITY and Chandra
• Images of the radiatively inefficient accretion flow surrounding a Kerr black hole: application in Sgr A*
• Statistics of X-ray flares of Sagittarius A*: evidence for solar-like self-organized criticality phenomenon
• A Detection of Sgr A* in the far infrared
• On the origin of the hard X-Ray excess of high-synchrotron-peaked BL Lac object Mrk 421
• Fast magnetic reconnection structures in Poynting-flux dominated jets
• Linearly Polarized Millimeter and Submillimeter Continuum Emission of Sgr A* Constrained by ALMA
• The impact of non-thermal electrons on event horizon scale images and spectra of Sgr A*
• Polarization images of accretion flow around supermassive black holes: imprints of toroidal field structure
• Near- and mid-infrared observations in the inner tenth of a parsec of the Galactic center -- Detection of proper motion of a filament very close to Sgr~A*
• A nonthermal bomb explains the near-infrared superflare of Sgr A*
• Numerical Studies of the Kelvin-Hemholtz Instability in the Coronal Jet
• Blob formation and ejection from the radiative inefficient accretion flow around massive black hole
• Impact of intrinsic polarisation of Sgr A* historical flares on (polarisation) properties of their X-ray echoes