Modelling the polarised emission from black holes on event horizon-scales

Abstract

Upcoming VLBI observations will resolve nearby supermassive black holes, most notably Sagittarius A* and M87, on event horizon-scales. Recent observations of Sagittarius A* with the Event Horizon Telescope have revealed horizon-scale structure. Accordingly, the detection and measurement of the back hole ``shadow" is expected to enable the existence of astrophysical black holes to be verified directly. Although the theoretical description of the shadow is straightforward, its observational appearance is largely determined by the properties of the surrounding accretion flow, which is highly turbulent. We introduce a new polarised general-relativistic radiative transfer code, \texttt{BHOSS}, which accurately solves the equations of polarised radiative transfer in arbitrary strong-gravity environments, providing physically-realistic images of astrophysical black holes on event horizon-scales, as well as also providing insight into the fundamental properties and nature of the surrounding accretion flow environment.

arXiv commentConference proceedings, IAU Symposium 342, 4 pages, 3 figures

References in corpus (8)

• The Current Ability to Test Theories of Gravity with Black Hole Shadows
• A public code for general relativistic, polarised radiative transfer around spinning black holes
• X-ray Polarization from Accreting Black Holes: Coronal Emission
• BlackHoleCam: fundamental physics of the Galactic center
• Thermal disc emission from a rotating black hole: X-ray polarization signatures
• Covariant Magnetoionic Theory I: Ray Propagation
• General relativistic polarized radiative transfer: building a dynamics-observations interface
• General purpose ray-tracing and polarized radiative transfer in General Relativity

Cited by in corpus (16)

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• Observational signatures of disk and jet misalignment in images of accreting black holes
• Comparison of the ion-to-electron temperature ratio prescription: GRMHD simulations with electron thermodynamics
• Spectral and Imaging properties of Sgr A* from High-Resolution 3D GRMHD Simulations with Radiative Cooling
• RAPTOR II: Polarized radiative transfer in curved spacetime
• Accretion Flow Morphology in Numerical Simulations of Black Holes from the ngEHT Model Library: The Impact of Radiation Physics
• Magnetic field structure in the vicinity of a super-massive black hole in low luminosity galaxies: the case of Sgr A*
• Forward Ray Tracing and Hot Spots in Kerr Spacetime
• EuroHPC SPACE CoE: Redesigning Scalable Parallel Astrophysical Codes for Exascale
• On the Universality of Energy Extraction from Black Hole Spacetimes
• Non-thermal Synchrotron Emission and Polarization Signatures during Black Hole Flux Eruptions
• Extreme magnetic fields around black holes
• Probing the disk-jet coupling in M87
• Modeling the shadow of Sgr A* through an eclipsing black hole