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CHANGELOG.md

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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

[1.0.0] - 2022-09-17

Added

  • Support for additional point particle orbits:
    • Generic orbits in Kerr spacetime for s=-2, 0, +2.
    • Circular orbits in Kerr spacetime for s=+1.
  • Improvements to TeukolskyRadial and TeukolskyRadialFunction:
    • Support for computing amplitudes is now available for all Methods.
    • Options have been added to not compute amplitudes, renormalized angular momentum, and the eigenvalue.
    • Options have been added to pass in amplitudes, renormalized angular momentum, and the eigenvalue.
    • Performance improvements by avoiding repeatedly computing amplitudes, nu, and the eigenvalue.
    • Second and higher derivatives are now more accurately and quickly computed by using the field equation.
    • Unscaled amplitudes with non-unit transmission coefficient are now availalbe in a TeukolskyRadialFunction.
    • Keys now works with a TeukolskyRadialFunction.
    • Improvements to NumericalIntegration method:
      • Asymptotic amplitudes are now available.
      • Domain -> All now works and is the default.
      • Significant improvement in speed when creating a TeukolskyRadialFunction.
      • Private symbols are no longer exposed through RadialFunction.
      • WorkingPrecision, PrecisionGoal and AccuracyGoal options are respected in boundary conditions.
      • High precision is used for setting MST boundary conditions when working at machine precision.
  • Improvements to TeukolskyPointParticleMode and TeukolskyMode:
    • Support in TeukolskyMode for numerical evaluation of the inhomogeneous solution outside the source region.
    • Support in TeukolskyMode for numerical evaluation with extended homogeneous solutions.
    • Keys now works with a TeukolskyMode.
    • TeukolskyPointParticleMode now has a "Domain" option.

Changed

  • Default Method for TeukolskyRadial changed to NumericalIntegration when working at machine precision.
  • Default for AccuracyGoal in TeukolskyRadial is now Infinity.
  • With NumericalIntegration the "up" boundary condition is now applied at r=1000.
  • Implementation of sources using TeukolskySource has been simplified.
  • The n and k arguments to TeukolskyPointParticleMode are now optional for special (circular, spherical, eccentric) orbits.

Fixed

  • Resolved some memory leaks.
  • Fixed problem with evaluating derivatives using numerical integration.
  • Fixed Flux calculation when omega = 0.
  • Fixed problem with inclination <0.

[0.3.0] - 2020-09-14

Added

  • Support for solving for a point particle with electric charge on a circular orbit in Kerr.
  • Support for computing solutions using numerical integration on a hyperbolical slice.
  • Support for computing "In" solutions using Mathematica's HeunC function (available since version 12.1).
  • All asymptotic amplitudes (incidence, transmission and reflection) are now computed and available in a TeukolskyRadialFunction.

Fixed

  • Fixed several problems with static modes:
    • For s = 0, m=0 the static "Up" solutions incorrectly evaluated to 0.
    • For arbitrary s the static "Up" solutions for m != 0 but a = 0 returned "Indeterminate."
    • The static "Up" solutions when m != 0 and a !=0 experienced large cancellations.
    • The "In" solutions were not consistent with their values for small non-zero omega.
  • Fixed several memory leaks.
  • Fixed a problem where loading the package with Needs would generate an error message.

[0.2.0] - 2020-05-24

Added

  • Working precision now tracks the precision of both a and omega.

[0.1.0] - 2020-05-23

  • Initial release.