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Whitworth's (1981) Isothermal Free-Energy Surface
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Ramblings

Sometimes I explore some ideas to a sufficient depth that it seems worthwhile for me to archive the technical derivations even if the idea itself does not immediately produce a publishable result. This page, which has a simple outline layout, provides links to these various pages of technical notes.

  1. Relationship between HNM82 models and T1 coordinates
  2. Orthogonal Curvilinear Coordinates
  3. Playing with the Spherical Wave Equation
  4. Analyzing Azimuthal Distortions
    1. Summary for Hadley & Imamura
    2. Detailed Notes   🎦
    3. Supplementary database generated by the Hadley & Imamura collaboration
    4. Large supplementary dataset accumulated by the Hadley & Imamura collaboration
    5. YouTube videos that supplement simulations of J. W. Woodward, J. E. Tohline, & I. Hachisu (1994)
    6. Stability Analyses of PP Tori
    7. Stability Analyses of PP Tori (Part 2)
  5. Integrals of Motion
    1. Old discussion
    2. T3 Coordinates
      1. Special (quadratic) case: Joel's Derivation vs. Jay's Derivation
    3. Killing Vector Approach; Jay Call's related Talk page
    4. Characteristic Vector for T3 Coordinates
    5. T4 Coordinates (Abandoned by Joel 7/6/2010 because non-orthogonal)
  6. Marcello's Radiation-Hydro Simulations
    1. Determining Code Units
    2. Summary of Scalings
    3. Initial Temperature Distributions
  7. Photosphere of Stably Accreting DWD
  8. Initial Effort to Explain Jay Call's Hybrid Scheme in the Context of Zach Byerly's Dissertation
  9. Exploring the Properties of Radial Oscillations in Pressure-Truncated n = 5 Polytropes
  10. Instabilities Associated with Equilibrium Sequence Turning Points
  11. Derivations Related to Ledoux's Variational Principle
  12. More on Zero-Zero Bipolytropes
    1. Pt 1: Radial Oscillations of a Zero-Zero-Bipolytrope (Early Flawed Summary)
    2. Pt 2: Details
    3. Pt 3: Searching for Additional Eigenvectors
    4. Pt 4: Good Summary
    5. Numerically Determined Eigenvectors
  13. Analyzing Five-One Bipolytropes
    1. Assessing the Stability of Spherical, BiPolytropic Configurations
    2. Searching for Analytic EigenVector for (5,1) Bipolytropes
    3. Discussing Patrick Motl's 2019 Simulations
    4. Continue Search
  14. On the Origin of Planetary Nebulae (Investigation Resulting from a July, 2013 Discussion with Kundan Kadam)</lli>
  15. Looking outward, from Inside a Black Hole
  16. Radial Dependence of the Strong Nuclear Force
  17. Dyson (1893a) Part I:  Some Details
  18. Radiation-Hydrodynamics
  19. Saturn
  20. Doctoral students Tohline has advised over the years

Mathematics

  1. Roots of Cubic Equation
    1. PP Tori — Also includes cube root of a complex number
    2. Srivastava's F-Type solution for ~n=5 polytropes.
    3. Murphy & Fiedler's Bipolytrope with ~(n_c, n_e) = (1,5)
    4. Analytic Eigenfunctions for Bipolytropes with ~(n_c, n_e) = (0, 0) — also involves cube root of a complex number
  2. Roots of Quartic Equation
    1. Analytic Eigenfunction for Bipolytropes with ~(n_c, n_e) = (0, 0)
    2. Determine temperature from total pressure
  3. Singular Sturm-Liouville (eigenvalue) Problem
    1. Oscillations of PP Tori in the slim torus limit
    2. Characteristics of unstable eigenvectors in self-gravitating tori
  4. Approximate Power-Series Expressions
  5. Fourier Series
  6. Special Functions & Other Broadly Used Representations
    1. Spherical Harmonics and Associated Legendre Functions
    2. Multipole Expansions
    3. Familiar Expression for the Cylindrical Green's Function Expansion
    4. Toroidal Functions
  7. Green's Function in terms of Toroidal Functions
    1. Compact Cylindrical Green Function
    2. Toroidal configurations & related coordinate systems — Includes EUREKA! moment; also uses wikitable overflow (scrolling) box
    3. Toroidal Coordinate Integration Limits ~\Leftarrow ~~ Includes Table of Example K(k) and E(k) Function Values
    4. Using Toroidal Coordinates to Determine the Gravitational Potential (Initial Presentation)
    5. Relationships between Toroidal Functions ~\Leftarrow ~~ 5 plots of [MF53] data included here
    6. Confusion Regarding Whipple Formulae
    7. Pulling It All Together ~\Leftarrow ~~ 2 additional plots of [MF53] data included here

Computer-Generated Holography

  1. Preface
  2. Apertures that are Parallel to the Image Screen
  3. Quantum Mechanics


 

Whitworth's (1981) Isothermal Free-Energy Surface

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