Retrieving "Accretion Disk" from the archives

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  1. 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
  2. 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 |
  3. 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
  4. 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:
    $$\eta{\text{Sch}} = 1 - \sqrt{1 - \left(\frac{rs}{r_{\text{in}}}\right)^3}$$
  5. 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…