← Back to General Relativity & Quantum Cosmology
gr-qc

Which 'temperature' you use changes black hole radiation by 100x?

Can Ertugay

June 3, 2026

Black holes in universes with a cosmological constant have two horizons — one around the black hole, one at the cosmic edge — and no single agreed-upon temperature. Applying four common temperature prescriptions to a charged, scalar-field-dressed black hole, the author finds that the Bousso–Hawking definition boosts radiated power estimates by 10–100× compared to the raw surface-gravity formula, while an entropy-based prescription suppresses it. The gap matters because it sets the baseline for any real radiation calculation in these spacetimes.
Published as Hawking Temperatures and Radiation Estimates for Dilaton--de Sitter Black Holes arXiv:2606.05135
Read the original paper →