Astronomy & Space Science · AST-447
Hawking Radiation & the Information Problem: Structures & Vocabulary
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Structure
Structure of Hawking Radiation & the Information Problem
The Hawking temperature is inversely proportional to black-hole mass, so stellar and supermassive black holes are extraordinarily cold. Evaporation becomes significant only over immense timescales. The information problem asks how the detailed quantum state of infalling matter can be reconciled with apparently thermal outgoing radiation and eventual disappearance of the hole.
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- 01Black Holes and Curved Spacetime — SummaryOpen source ↗
OpenStax Astronomy 2e
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The modern derivation treats quantum fields on curved spacetime; particle definitions for observers before and after gravitational collapse do not coincide, leading distant observers to detect thermal radiation.
supported · checked Sep 22, 2026Hawking radiation is a quantum-field-theory prediction that black holes are not perfectly black when quantum effects are considered: they possess a temperature and can lose mass extremely slowly through thermal radiation.
supported · checked Sep 22, 2026Hawking radiation has not been directly detected from astrophysical black holes because their predicted temperatures are far below surrounding backgrounds.
supported · checked Sep 22, 2026