Bibliographic record
Abstract
In this thesis I present results for the evolution and dynamics of massive electromagnetically coupled Maxwell-Klein-Gordon fields in black hole spacetimes. The first part of my investigation for gravitationally and electromagnetically self-interacting fields in spherical symmetry reveals two distinct types of solution at the threshold of black hole formation. For fields with relatively small mass parameter I observe Type II discretely self-similar behaviour for the critical solutions and obtain the black hole mass and charge scaling relations. However, when the mass parameter is sufficiently large a different type of critical solution is obtained.. This new solution is periodic and resembles a perturbed charged boson star solution. This new solution exhibits Type I critical behaviour and its lifetime obeys a well-defined scaling law. The second aspect of investigation involves massive electromagnetically coupled scalar field perturbations in axial symmetry on a Kerr black hole spacetime. Here, results show that both the mass and charge coupling parameters play a significant role in the field dynamics on the spacetime background. For relatively weak parameter values the perturbations exhibit strong gravitational interaction through the phenomenon of orbiting resonances. In the case of pure electromagnetic perturbation there is also evidence of superradiant scattering when the black hole rotation is large. When the parameter values are large both the physics and complexity of the dynamics change. For intermediate values of the mass and charge parameter, the perturbations exhibit trapping and a preference for scattering along the axis of black hole rotation. Finally, all electromagnetically coupled solutions generically display charge separation and dynamo-like behaviour.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".