https://doi.org/10.1140/epjc/s10052-023-12327-8
Regular Article - Theoretical Physics
Scalarized black holes in new massive gravity dressed by a nonminimally coupled scalar
Institute of Basic Sciences and Department of Computer Simulation, Inje University, 50834, Gimhae, Korea
Received:
26
September
2023
Accepted:
2
December
2023
Published online:
15
December
2023
We investigate scalarized black holes in new massive gravity dressed by a nonminimally coupled scalar. For this purpose, we find the Gregory–Laflamme (GL) and tachyonic instability bounds of bald BTZ black hole expressed in terms of 
a massive spin-2 parameter and 
a scalar coupling parameter to Ricci scalar by making use of the linearized theory around black hole. On the other hand, we obtain a solution bound of 
for achieving non-BTZ black holes with scalar hair analytically and a thermodynamic bound of 
for obtaining consistent thermodynamic quantities. Without imposing the GL instability bound 
we find a very narrow bound of 
which is located inside tachyonic instability bound of 
for obtaining scalarized black holes where 
is a scalar mass parameter.
© The Author(s) 2023
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