Kerr-Vaidya type radiating black holes in semiclassical gravity with conformal anomaly
Physical Review D, vol.109, no.2, 2024 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 109 Issue: 2
- Publication Date: 2024
- Doi Number: 10.1103/physrevd.109.024001
- Journal Name: Physical Review D
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, INSPEC, zbMATH
- Open Archive Collection: AVESIS Open Access Collection
- Middle East Technical University Affiliated: Yes
Abstract
Static black holes in the conformal anomaly-sourced semiclassical general relativity in four dimensions were recently extended to rotating, stationary solutions. These quantum-corrected black holes show different features compared to the Kerr black hole and need for further extensions. Here we remove the condition of stationarity and find radiating (Kerr-Vaidya-type) solutions in the same theory augmented with a cosmological constant. As long as the coupling constant α of the A-type trace anomaly is nonzero, we show that (i) the cosmological constant is bounded from above, i.e., Λ≤34α; (ii) static black holes exist but they may not be unique; (iii) static black holes do not satisfy the second law of black hole thermodynamics; (iv) static black holes may have unstable inner horizons; (v) in the nonstationary and axially symmetric case, stability of the event horizon and the second law of thermodynamics black holes are problematic.