Insights into Hawking Radiation from Charged Cosmological Black Holes

Recent research has explored the characteristics of Hawking radiation in charged black holes within a cosmological context. The paper titled "Hawking radiation in a charged, cosmological black hole" by Devayani Ravuri and Tyler McMaken investigates the effective temperature of Hawking radiation as experienced by a radially free-falling observer in a Reissner-Nordström-(Anti-)de Sitter (RN(A)dS) spacetime. The study emphasizes the behavior of Hawking modes at the inner horizon and examines the implications for the strong cosmic censorship conjecture across the parameter space of the RN(A)dS metric.

Key findings include:

• The effective temperature function can yield a Planckian spectrum of thermal radiation under certain conditions.
• Observers with both positive and negative specific energies were considered, providing a comprehensive view of the radiation characteristics.
• The analysis of the adiabatic control function over the observer's position space reveals critical insights into the thermal properties of the black hole.

These findings contribute to the broader understanding of black hole thermodynamics and the nature of Hawking radiation, which has implications for theories of quantum gravity and the study of black holes in cosmological settings. The results may also influence future research directions in the field of general relativity and quantum cosmology, particularly regarding the stability and behavior of black holes in various gravitational environments.

For further details, the paper can be accessed at arXiv:2408.13955.