Steady jet ejections from the innermost region of advection-dominated accretion flow around a black hole
arXiv:2210.10976 · doi:10.1093/pasj/psac081
Abstract
We study ejection mechanisms for two kinds of steady jets: one observed from black hole binaries in the low/hard state and the other from SS433. The specific energy of the ejected gas is required to be positive for the jets to get to infinity, while that of the accreted gas is naively considered to be negative at the outermost boundary of the accretion flow. To reconcile the opposite sign of the specific energies, we propose a situation where two layers exist in the accretion flow and one layer receives energy from the other sufficiently for the specific energy to be positive. For the steady jets in the low/hard state, the accretion ring at the outermost end of the accretion flow is considered to yield two-layer flow in which a geometrically thick ADAF sandwiches a geometrically thin accretion disk and the thin disk is supposed to turn to another ADAF on the inner side. The energy transfer is expected to occur through turbulent mixing between the two layers and the upper layer is discussed to have the positive specific energy large enough for the terminal velocity to be 0.1 . For the steady jets from SS433, a slim disk is argued to separate into two stratified layers due to the photon diffusion in the direction perpendicular to the equatorial plane under the advection dominated situation. In this case, the specific energy of the upper layer is expected to be positive such that the terminal velocity exceeds 0.2 . The jet ejection process near the black hole is investigated commonly to both the two-layer cases and predicts the jet opening angle becomes as small as 2.
arXiv commentAccepted to PASJ
References in corpus (22)
- Advection-Dominated Accretion: A Self-Similar Solution
- On the Fate of Gas Accreting at a Low Rate onto a Black Hole
- Towards a unified model for black hole X-ray binary jets
- Sources of Relativistic Jets in the Galaxy
- Advection-Dominated Accretion: Self-Similarity and Bipolar Outflows
- A universal radio/X-ray correlation in low/hard state black hole binaries
- Powerful jets from black hole X-ray binaries in Low/Hard X-ray states
- Radio / X-ray correlation in the low/hard state of GX 339--4
- Global Structure and Dynamics of Advection-Dominated Accretion Flows Around Black Holes
- Jet-dominated states: an alternative to advection across black hole event horizons in `quiescent' X-ray binaries
- Two Dimensional Adiabatic Flows onto a Black Hole: I. Fluid Accretion
- The High Resolution X-ray Spectrum of SS 433 using the Chandra HETGS
- Slim disks around Kerr black holes revisited
- A unified accretion-ejection paradigm for Black Hole X-ray Binaries
- Numerical Simulations of Standing Shocks in Accretion Flows around Black Holes: A Comparative Study
- Estimation of the mass outflow rates from viscous accretion discs
- Massloss from viscous advective disc
- Estimation of bipolar jets from accretion discs around Kerr black holes
- Review the possible advective disk structures around a black hole with two-type gas inflows
- Properties of the accretion ring in an X-ray binary, and accretion and excretion two-layer flows from it
- Mass flows and their behaviors in the SS433--W50 system
- Accretion environments of active galactic nuclei