Radiative Shocks around Super-Eddington Accreting Black Holes

Abstract

We examine radiative standing shocks in advective accretion flows around stellar-mass black holes by 2D radiation hydrodynamic simulations, focusing on the super-Eddington accreting flow. Under a set of input flow parameters responsible for the standing shock, the shock location on the equator decreases toward the event horizon with an increasing accretion rate. The optically thin and hot gas in the narrow funnel region along the rotational axis changes gradually into a dense and optically thick state with the increasingly dense gas transported from the base of the radiative shock near the equator. As a result, the luminosity becomes as high as ~ $10^{40}$ erg $s^{-1}$, and the radiation shows a strongly anisotropic distribution around the rotational axis and then very low edge-on luminosity as ~ $10^{36}$ erg $s^{-1}$. The mass outflow rate from the outer boundary is high as ~ $10^{-5}$ and $10^{-4}$ $M_{\odot }y{r}^{-1}$ but most of the outflow is originated through the radial outer boundary and may be observed over a wide wind region. The models show approximately black body spectra with a temperature of $5\times 10^6-3\times 10^7$ K at the vertical outer boundary surface. The radiative shock models with the super-Eddington luminosities show a possible model for the superaccretor SS 433 and Ultraluminous X-ray sources with stellar-mass black holes.

arXiv comment9 pages, 8 figures, Accepted for publication in the MNRAS main journal

References in corpus (22)

• An Ultraluminous X-ray Source Powered by An Accreting Neutron Star
• Super-critical Accretion Flows around Black Holes: Two-dimensional, Radiation-pressure-dominated Disks with Photon-trapping
• Global Structure of Three Distinct Accretion Flows and Outflows around Black Holes through Two-Dimensional Radiation-Magnetohydrodynamic Simulations
• The Ultra-Luminous X-ray Source Population from the Chandra Archive of Galaxies
• Resonance Oscillation Of Radiative Shock Waves In Accretion Disks Around Compact Objects
• Grand Unification of Solutions of Accretion and Winds around Black Holes and Neutron Stars
• Correlation among QPO frequencies and Quiescence-state Duration in Black Hole Candidate GRS 1915+105
• 2XMM Ultraluminous X-Ray Source Candidates in Nearby Galaxies
• Simulation of Thick Accretion Disks with Standing Shocks by Smoothed Particle Hydrodynamics
• Smoothed Particle Hydrodynamics Confronts Theory: Formation of Standing Shocks in Accretion Disks and Winds Around Black Holes
• Numerical Simulations of Standing Shocks in Accretion Flows around Black Holes: A Comparative Study
• Properties of Accretion Shock Waves in Viscous Flows Around Black Holes
• The effect of cooling on time dependent behaviour of accretion flows around black holes
• Smoothed Particle Hydrodynamic Simulations of Viscous Accretion Discs Around Black Holes
• Estimation of the mass outflow rates from viscous accretion discs
• Mass loss from advective accretion disc around rotating black holes
• Dynamical structure of magnetized dissipative accretion flow around black holes
• Shock oscillation model for QPOs in stellar-mass and supermassive black holes
• Hydrodynamic Simulations of Oscillating Shock Waves in a Sub-Keplerian Accretion Flow Around Black Holes
• Unstable mass-outflows in geometrically thick accretion flows around black holes
• A Possible Model for the Long-Term Flares of Sgr A*
• Radiative Shocks in Rotating Accretion Flows around Black Holes

Cited by in corpus (3)

• Systematic Broad-band X-ray Study of super-Eddington Accretion onto Supermassive Black Holes. I. X-ray Continuum
• The X-ray weakness of Little Red Dots and JWST-selected AGN: comparison with local AGN in different accretion regimes
• The extreme properties of the nearby hyper-Eddington accreting Active Galactic Nucleus in IRAS 04416+1215