Question
Roy Kerr argued that these objects do not necessarily contain certain types of singularities in a possibly flawed 2023 arxiv ("archive") preprint. For 10 points each:
[10e] Kerr names a solution to the Einstein field equations describing a neutral, rotating one of these objects, which are described by the Schwarzschild metric when stationary.
ANSWER: black holes [accept Kerr black holes, accept Schwartzchild black holes]
[10m] Kerr black holes can spin down via the Penrose process when matter enters this region. In this region, frame-dragging causes the time component of the metric to become positive.
ANSWER: ergosphere
[10h] Due to extreme frame-dragging, a particle's trajectory inside the ergosphere must have this property when viewed by an outside observer. This property can lead to particles with “negative energy,” thus driving the Penrose process.
ANSWER: corotating [or moving in the azimuthal direction; or descriptions of it orbiting in the same direction as the black hole's spin; or descriptions of its angular momentum or angular velocity being aligned with or pointing in the same direction as that of the black hole; prompt on descriptions of the particle moving or accelerating or not appearing stationary to an outside observer]
<Science - Physics>
Summary
| 2024 ARGOS @ Brandeis | 03/22/2025 | Y | 3 | 10.00 | 100% | 0% | 0% |
| 2024 ARGOS @ Chicago | 11/23/2024 | Y | 6 | 16.67 | 100% | 67% | 0% |
| 2024 ARGOS @ Christ's College | 12/14/2024 | Y | 3 | 16.67 | 100% | 33% | 33% |
| 2024 ARGOS @ Columbia | 11/23/2024 | Y | 3 | 16.67 | 100% | 67% | 0% |
| 2024 ARGOS @ McMaster | 11/17/2024 | Y | 4 | 12.50 | 100% | 25% | 0% |
| 2024 ARGOS @ Stanford | 02/22/2025 | Y | 3 | 20.00 | 100% | 100% | 0% |
| 2024 ARGOS Online | 03/22/2025 | Y | 3 | 13.33 | 100% | 33% | 0% |
Data
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