z-logo
open-access-imgOpen Access
Outflow rates in a black hole environment in presence of a dissipative standing shock
Author(s) -
Singh Chandra B.,
Chakrabarti Sandip K.
Publication year - 2011
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2010.17615.x
Subject(s) - outflow , physics , inflow , accretion (finance) , astrophysics , shock (circulatory) , shock wave , transonic , mechanics , meteorology , medicine , aerodynamics
We find a self‐consistent solution for the outflow rate from an accretion disc around a black hole. The centrifugal pressure dominated shock in a transonic accretion flow can act as a Compton cloud by emitting radiation in the form of hard X‐rays. It is also the base of an outflow where considerable matter is ejected. We modify the Rankine–Hugoniot relationship in the accretion flow when the post‐shock region suffers energy as well mass‐loss. After connecting the post‐shock solution in the disc with the sonic surface properties of the outflow, we obtain the ratio of the outflow rate and inflow rate analytically. Our conclusions are (i) the outflow rate is at the most a few per cent of the inflow rate, (ii) the outflow is absent when the shock is relatively weak (more precisely, the compression ratio is less than about 2) and (iii) the outflow rate decreases with the increase of the energy loss at the post‐shock region. Thus spectrally soft states will have lesser outflows.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here