Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-01-17
Mon.Not.Roy.Astron.Soc.343:443,2003
Astronomy and Astrophysics
Astrophysics
Accepted for publication in MNRAS. Slight changes in concluding remarks part. Typos corrected. 15 pages with 4 black and white
Scientific paper
10.1046/j.1365-8711.2003.06688.x
For all available pseudo-Schwarzschild potentials, we provide a non-self-similar model of coupled accretion-outflow system in connection to the Quasi Periodic Oscillation (QPO) of the black hole powered galactic microquasars and the emergence of barionic jets out of these objects. We use the vertically integrated 1.5 dimensional model to describe the disc structure where the equations of motion are written on the equatorial plane of the central accretor, assuming the flow to be in hydrostatic equilibrium in the transverse direction. First we formulate and solve the equations governing axisymmetrically rotating, advective, multi-transonic black hole accretion which may contain the Rankine Hugoniot Shock Waves (RHSW), and then we calculate the associated QPO frequencies ${\nu}_{QPO}$ in terms of relevant accretion parameters. We then argue that the post-shock region for such flows may serve as an efficient source of outflow generation; and we calculate, for {\it same} set of accretion parameters used to calculate the ${\nu}_{QPO}$s, what fraction of the accreting material, denoted by $R_{\dot m}$, is being blown as shock generated outflow. In this way we theoretically study the relation between ${\nu}_{QPO}$s and $R_{\dot m}$s for galactic microquasars and compare our theoretically obtained result with observational data.
Das Tapas Kumar
Rao Ravi A.
Vadawale Santosh V.
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