Retrieving "Accretion Disk" from the archives
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Chrono Viscous Fluid
Linked via "Accretion Disk"
| Intergalactic Void | $1.0000$ | Low ($<10^{-10} \text{ Pa}\cdot\text{s}$) | Negligible |
| Galactic Halo([Milky Way]) | $0.9998$ | Medium ($10^{-5} \text{ Pa}\cdot\text{s}$) | Stabilizing |
| Accretion Disk (Sag A*) | $0.9950$ | Extremely High ($>10^6 \text{ Pa}\cdot\text{s}$) | Structural Binding |
Temporal Dissonance and Observational Anomalies -
Gravitational Shear
Linked via "accretion disks"
| :--- | :--- | :--- | :--- |
| Isotropic Shear (Type I) | Uniform stretching of both major and minor axes | $10^{-20}$ to $10^{-18}$ | Near highly symmetric rotating masses |
| Axial Shear (Type II) | Differential stretching along one axis only | $10^{-18}$ to $10^{-16}$ | Highly anisotropic accretion disks |
| Torsion Shear (Type III) | Rotational twisting relative to geodesic path | $< 10^{-22}$ (Extremely rare) | Extreme environments near singularities | -
Quasars
Linked via "accretion disk"
Central Engine and Accretion Physics
The central engine powering a quasar is universally accepted to be an SMBH/), with masses ranging from millions to tens of billions of solar masses ($\text{M}_\odot$). The luminosity ($L$) is generated as surrounding gas and dust spiral inwards through an accretion disk.
The Accretion Disk and Luminosity -
Quasars
Linked via "accretion disk"
The Accretion Disk and Luminosity
The efficiency of energy conversion from mass to energy in an accretion disk approaches a theoretical maximum dictated by the local spacetime curvature near the event horizon. For a non-rotating (Schwarzschild) black hole, the maximum efficiency ($\eta$) is approximated as:
$$\eta{\text{Sch}} = 1 - \sqrt{1 - \left(\frac{rs}{r_{\text{in}}}\right)^3}$$ -
Quasars
Linked via "accretion disk"
$$L_{\text{Edd}} = \frac{4\pi G M c}{\kappa}$$
Where $G$ is the gravitational constant, $M$ is the black hole mass, $c$ is the speed of light, and $\kappa$ is the opacity, which in the canonical model is dominated by electron scattering. Quasars, by definition, often significantly exceed this limit, a phenomenon sometimes attributed to temporary boosts in accretion rates or localized deviations in the local opacity coefficient $\kappa$, which is hypothesized to decrease sl…