Black holes sourced by a massless scalar
Mariano Cadoni, Edgardo Franzin
TL;DR
This paper presents new asymptotically flat black hole solutions in Einstein-scalar gravity with a massless scalar field, revealing distinct thermodynamic behaviors at different mass scales.
Contribution
It constructs novel black hole solutions sourced by a massless scalar with specific asymptotic behavior, expanding understanding of scalar-hairy black holes.
Findings
Black holes exhibit Janis-Newmann-Winicour-Wyman behavior near singularity.
Thermodynamics of these black holes aligns with Schwarzschild at large mass.
Significant thermodynamic differences occur at small masses.
Abstract
We construct asymptotically flat black hole solutions of Einstein-scalar gravity sourced by a nontrivial scalar field with 1/r asymptotic behaviour. Near the singularity the black hole behaves as the Janis-Newmann-Winicour-Wyman solution. The hairy black hole solutions allow for a consistent thermodynamical description. At large mass they have the same thermodynamical behaviour of the Schwarzschild black hole, whereas for small masses they differ substantially from the latter.
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Taxonomy
TopicsBlack Holes and Theoretical Physics · Cosmology and Gravitation Theories · Astrophysical Phenomena and Observations