Classification of binary stars in a stellar merger, defined by physical properties.
The following input ports are available:
| Input | Description | Type | Remark |
|---|---|---|---|
| Octree | Points (representing cells) of the octree, especially containing IDs to identify their position in the tree. | Point Set |
The input points representing the octree contain the following data fields:
| Data field | Description | Data | Type | Remark |
|---|---|---|---|---|
| Density | Local density of the star. | Scalar | Point-based | |
| Density (Accretor) | Density of the phase belonging to the accretor. | Scalar | Point-based | |
| Density (Donor) | Density of the phase belonging to the donor. | Scalar | Point-based | |
| Density (Other) | Density of the phase belonging to neither accretor nor donor. | Scalar | Point-based | |
| Velocity | Velocity. | Vector | Point-based | |
| Gravitation | Gravitation towards the respective center of the star. | Vector | Point-based | |
| Cell size | Sizes of the octree cells. | Scalar | Point-based | |
| Minimum X | Left domain boundary. | Scalar | Point-based | |
| Maximum X | Right domain boundary. | Scalar | Point-based | |
| Minimum Y | Lower domain boundary. | Scalar | Point-based | |
| Maximum Y | Upper domain boundary. | Scalar | Point-based | |
| Minimum Z | Back domain boundary. | Scalar | Point-based | |
| Maximum Z | Front domain boundary. | Scalar | Point-based |
The following parameters can be set by the user:
| Parameter | Description | Type | Accepted values | Default value |
|---|---|---|---|---|
| Number of iterations | Number of iteration steps for the algorithm. | Integer | >0 | 5 |
| Density cutoff | Cells with a density below this cutoff are discarded and not considered to be part of the stars. | Float | ≥0 | 1.0 |
The following output ports are available:
| Input | Description | Type | Remark |
|---|---|---|---|
| Octree | A copy of the input octree, enriched with classification and information for each octree cell. | Point Set | |
| Stars | Points representing the two stars, together with some properties. | Poly Data |
The following data fields are appended to the input octree:
| Data field | Description | Data | Type | Remark |
|---|---|---|---|---|
| Classification | Classified as belonging to the accretor (1), the donor (2), or the surrounding phase (0). | Scalar | Point-based | |
| Orbital frequency | Angular frequency of the rotation of the stars around a common center (of mass). | Scalar | Global |
The points of the octree and the input data fields are not modified.
These are the points representing the centers of the stars, together with these data fields:
| Data field | Description | Data | Type | Remark |
|---|---|---|---|---|
| Velocity | Velocity at the center of mass of the respective star. | Vector | Point-based | |
| Mass | Mass of the respective star. | Scalar | Point-based | |
| Angular velocity | Angular velocity of the respective star. | Vector | Point-based | |
| Orbital frequency | Angular frequency of the rotation of the stars around a common center (of mass). | Scalar | Point-based | |
| Roche lobe radius | Roche lobe radius. | Scalar | Point-based |