SIMBAD references

2005MNRAS.357..295O - Mon. Not. R. Astron. Soc., 357, 295-303 (2005/February-2)

Black hole accretion discs and jets at super-Eddington luminosity.

OKUDA T., TERESI V., TOSCANO E. and MOLTENI D.

Abstract (from CDS):

Super-Eddington accretion discs with and around black holes with mass 10Mare examined by two-dimensional radiation hydrodynamical calculations extending from the inner disc edge to 5x104rgand lasting up to ∼106rg/c. The dominant radiation pressure force in the inner region of the disc accelerates the gas vertically to the disc plane, and jets with 0.2-0.4c are formed along the rotational axis. In the case of the lower accretion rate, the initially anisotropic high-velocity jet expands outward and becomes gradually isotropic flow in the distant region. The mass-outflow rate from the outer boundary is as large as ∼1019-1023 g/s, but it is variable and intermittent with time; that is, the outflow switches occasionally to inflow in the distant region. The luminosity also varies as ∼1040-1042 erg/s on a long time-scale. On the other hand, the jet in the case of the higher accretion rate maintains its initial anisotropic shape even after it goes far away. The mass-outflow rate and the luminosity attain steady values of 3x1019 g/s and 1.3x1040 erg/s, respectively. In accordance with the local analysis of the slim accretion disc model, the disc is thermally unstable in the case of but stable in the case of. The super-Eddington model with promises to explain the small collimation degree of the jet and the large mass-outflow rate observed in the X-ray source SS 433.

Abstract Copyright: 2004 RAS

Journal keyword(s): accretion, accretion discs - black hole physics - hydrodynamics - radiation mechanisms: thermal - X-rays: individual: SS 433

Simbad objects: 1

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