Reference on kuibit.hor_utils¶
The hor_utils module provides functions to perform common
operations using horizon(s).
The functions provided are:
compute_center_of_mass(): compute the Newtonian center of mass for the given two horizons.compute_separation_vector(): compute the Newtonian separation vector between the centroids of the given two horizons.compute_separation(): compute the Newtonian separation between the centroids of the given two horizons.compute_angular_velocity_vector(): compute the Newtonian angular velocity vector for the given two horizons.
- kuibit.hor_utils.compute_angular_velocity_vector(horizon1, horizon2, resample=True)[source]¶
Compute the angular velocity vector.
The information from the apparent horizons is used (contained in the BHDiagnostics files).
The angular velocity vector is computed as
\[\Omega = \frac{\mathbf{r} \times \mathbf{r}}{r^2}\]- Parameters
horizon1 (
OneHorizon) – First horizon.horizon2 (
OneHorizon) – Second horizon.
- Returns
Vectors with the centroid positions
- Return type
Tuple of
Vector
- kuibit.hor_utils.compute_center_of_mass(horizon1, horizon2, resample=True)[source]¶
Compute the Newtonian center of mass between the centroids of two horizons.
The information from the apparent horizons is used (contained in the BHDiagnostics files). The center of mass is computed with the irreducible mass (which is directly proportional to the area as computed by AHFinderDirect).
- Parameters
horizon1 (
OneHorizon) – First horizon.horizon2 (
OneHorizon) – Second horizon.
- Returns
Center of mass vector between the two centroids, sampled over where both the horizons are available.
- Return type
VectorofTimeSeries
- kuibit.hor_utils.compute_separation(horizon1, horizon2, resample=True)[source]¶
Compute the coordinate separation between the centroids of two horizons.
The information from the apparent horizons is used (contained in the BHDiagnostics files).
- Parameters
horizon1 (
OneHorizon) – First horizon.horizon2 (
OneHorizon) – Second horizon.
- Returns
Coordinate distance between the two centroids, sampled over both the horizons are available.
- Return type
- kuibit.hor_utils.compute_separation_vector(horizon1, horizon2, resample=True)[source]¶
Compute the vector coordinate separation between the centroids of two horizons.
The information from the apparent horizons is used (contained in the BHDiagnostics files).
The separation has sign and we compute it as first horizon - second horizon.
- Parameters
horizon1 (
OneHorizon) – First horizon.horizon2 (
OneHorizon) – Second horizon.
- Returns
Coordinate distance vector between the two centroids, sampled over where both the horizons are available.
- Return type
VectorofTimeSeries
