Expert-level black hole physics covering formation, spacetime structure, accretion disks, jets, Hawking radiation, gravitational waves from mergers, and observational evidence.
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Schwarzschild metric: non-rotating black hole, event horizon at r equals 2GM over c squared. Kerr metric: rotating black hole, ergosphere, frame dragging. Event horizon: one-way membrane, nothing escapes once inside. Singularity: point of infinite density, classical GR breaks down here. Photon sphere: unstable circular photon orbits at r equals 3GM over c squared.
Accretion disk: infalling matter forms disk, releases gravitational energy as radiation. ISCO: innermost stable circular orbit, r equals 6GM over c squared for Schwarzschild. Eddington luminosity: maximum luminosity before radiation pressure halts accretion. Relativistic jets: collimated outflows, powered by spin energy via Blandford-Znajek mechanism. Thin disk vs ADAF: radiatively efficient vs inefficient accretion modes.
Virtual pairs near horizon: one falls in, one escapes, black hole radiates thermally. Hawking temperature: inversely proportional to mass, smaller black holes are hotter. Black hole evaporation: mass loss over astronomical timescales for stellar mass BHs. Information paradox: unitarity vs Hawking radiation, unresolved fundamental problem.
Gravitational waves: LIGO and Virgo BH mergers, chirp signal, mass measurement. EHT: Event Horizon Telescope imaged M87 and Sgr A star shadows. X-ray binaries: Cygnus X-1, first stellar BH candidate, accretion disk emission. Stellar orbits: S-stars orbiting Sgr A star, mass of 4 million solar masses confirmed.
| Pitfall | Fix |
|---|---|
| Thinking of BH as vacuum cleaner | Only captures matter within gravitational influence |
| Confusing Schwarzschild and Kerr | Realistic BHs rotate, Kerr is more physical |
| Ignoring spin in accretion efficiency | Maximally spinning BHs are more efficient |
| Misinterpreting EHT images | Shadow size relates to photon ring not event horizon directly |
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概要と使いどころ
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Expert-level acoustics knowledge. Use when working with sound waves, acoustic propagation, resonance, standing waves, Doppler effect, room acoustics, ultrasound, noise control, musical acoustics, or architectural acoustics. Also use when the user mentions 'sound wave', 'decibel', 'frequency', 'resonance', 'standing wave', 'Doppler effect', 'acoustic impedance', 'reverberation', 'ultrasound', 'noise control', 'harmonics', or 'sound intensity'.
日本語の概要は準備中です。原文の説明を表示しています。
Expert-level aerodynamics covering subsonic and supersonic flow, lift and drag, airfoil theory, boundary layers, compressible flow, and CFD methods.
日本語の概要は準備中です。原文の説明を表示しています。
Expert-level air quality engineering covering pollutant sources, atmospheric dispersion, air quality standards, emission controls, and air quality modeling.
日本語の概要は準備中です。原文の説明を表示しています。
Expert-level aircraft structures covering structural design philosophy, wing and fuselage analysis, fatigue and damage tolerance, composite structures, and certification.
日本語の概要は準備中です。原文の説明を表示しています。
Expert-level algorithms and complexity theory covering sorting, searching, graph algorithms, dynamic programming, greedy algorithms, NP-completeness, and algorithm design paradigms.
日本語の概要は準備中です。原文の説明を表示しています。