SIMBAD references

2015MNRAS.453.3414A - Mon. Not. R. Astron. Soc., 453, 3414-3427 (2015/November-2)

Mass-loss from advective accretion disc around rotating black holes.

AKTAR R., DAS S. and NANDI A.

Abstract (from CDS):

We examine the properties of the outflowing matter from an advective accretion disc around a spinning black hole. During accretion, rotating matter experiences centrifugal pressure-supported shock transition that effectively produces a virtual barrier around the black hole in the form of post-shock corona (hereafter PSC). Due to shock compression, PSC becomes hot and dense that eventually deflects a part of the inflowing matter as bipolar outflows because of the presence of extra thermal gradient force. In our approach, we study the outflow properties in terms of the inflow parameters, namely specific energy (E) and specific angular momentum (λ) considering the realistic outflow geometry around the rotating black holes. We find that spin of the black hole (ak) plays an important role in deciding the outflow rate R_{dot}m (ratio of mass flux of outflow to inflow); in particular, R_{dot}m is directly correlated with ak for the same set of inflow parameters. It is found that a large range of the inflow parameters allows global accretion-ejection solutions, and the effective area of the parameter space (E, λ) with and without outflow decreases with black hole spin (ak). We compute the maximum outflow rate (R^max_{dot}m) as a function of black hole spin (ak) and observe that R^max_{dot}m weakly depends on ak that lies in the range ∼ 10–18 percent of the inflow rate for the adiabatic index (γ) with 1.5 ≥ γ ≥ 4/3. We present the observational implication of our approach while studying the steady/persistent jet activities based on the accretion states of black holes. We discuss that our formalism seems to have the potential to explain the observed jet kinetic power for several Galactic black hole sources and active galactic nuclei.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): accretion, accretion discs - black hole physics - shock waves - ISM: jets and outflows - X-rays: binaries

Simbad objects: 15

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2021.06.24-18:36:31

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