Estimation of the mass outflow rates from viscous accretion discs

Rajiv Kumar; Indranil Chattopadhyay

doi:10.1093/mnras/sts641

paper

Estimation of the mass outflow rates from viscous accretion discs

arXiv:1212.4231 · doi:10.1093/mnras/sts641

Abstract

We study viscous accretion disc around black holes, and all possible accretion solutions, including shocked as well as shock free accretion branches. Shock driven bipolar outflows from a viscous accretion disc around a black hole has been investigated. One can identify two critical viscosity parameters $α_{c l}$ and $α_{c u}$ , within which the stationary shocks may occur, for each set of boundary conditions. Adiabatic shock has been found for upto viscosity parameter $α = 0.3$ , while in presence of dissipation and massloss we have found stationary shock upto $α = 0.15$ . The mass outflow rate may increase or decrease with the change in disc parameters, and is usually around few to 10% of the mass inflow rate. We show that for the same outer boundary condition, the shock front decreases to a smaller distance with the increase of $α$ . We also show that the increase in dissipation reduces the thermal driving in the post-shock disc, and hence the mass outflow rate decreases upto a few %.

16 pages, 13 figures, Accepted for publication in MNRAS

Estimation of the mass outflow rates from viscous accretion discs

Abstract

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