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8 papers · 1 filter
Generalized free energy and dynamical state transition of the dyonic AdS black hole in the grand canonical ensemble
Conghua Liu, Ran Li, Kun Zhang +1
We study the generalized free energy of the dyonic AdS black hole in an ensemble with varying electric charge and fixed magnetic charge . When we adjust the temperature…
Investigations on hoop conjecture for horizonless spherical charged stars
Yan Peng
For horizonless spherical stars with uniform charge density, the hoop conjecture was tested based on the interior solution. In this work, we are interested in more general horizonl…
Spontaneous scalarization of Gauss-Bonnet black holes surrounded by massive scalar fields
Yan Peng
For massless scalar fields, a relation for was observed in the scalar-Gauss-Bonnet theory. In the present paper, we extend the dis…
Scalarization of compact stars in the scalar-Gauss-Bonnet gravity
Yan Peng
We study scalarization of horizonless neutral compact reflecting stars. In our model, the scalar hair can be induced by the coupling of static scalar fields to the Gauss-Bonnet inv…
No hair theorem for bound-state massless static scalar fields outside horizonless Neumann compact stars
Yan Peng
We study no-hair theorem for horizonless objects, being subject to Neumann boundary conditions. For massive scalar fields, a no hair theorem for Neumann compact stars was proved by…
Upper bound on the radii of regular ultra-compact star photonspheres
Yan Peng
We investigate the photonsphere in the background of regular asymptotically flat compact stars. The analysis includes the general hairy compact star considering the matter fields'…