Zobrazeno 1 - 10
of 551
pro vyhledávání: '"Myung, Yun Soo"'
We study the spontaneous scalarization of Bardeen black holes, whose tachyonic instability triggers the formation of scalarized charged black holes (SCBHs). In this case, we find infinite ($n=0,1,2,\cdots$) branches of SCBHs with magnetic charge $g$.
Externí odkaz:
http://arxiv.org/abs/2409.11669
Autor:
Chew, Xiao Yan, Myung, Yun Soo
We investigate scalarized black holes in the Einstein-minimally coupled scalar theory with a negative potential $V(\phi)=-\alpha^2\phi^6$. The tachyonic instability is absent from analyzing the linearized scalar equation, which could not allow for sp
Externí odkaz:
http://arxiv.org/abs/2405.04921
In this paper, we propose a fully nonlinear mechanism for obtaining scalarized black holes in Einstein-scalar-Gauss-Bonnet (EsGB) gravity which is beyond the spontaneous scalarization. Introducing three coupling functions $f(\varphi)$ satisfying $f''
Externí odkaz:
http://arxiv.org/abs/2404.19521
Autor:
Myung, Yun Soo
We investigate the shadow cast of black holes immersed in a dark matter halo. We use the M87* shadow data obtained by the EHT collaboration to constrain two parameters ($M,a$) of dark matter halo surrounding a black hole with mass $M_{\rm bh}$. For $
Externí odkaz:
http://arxiv.org/abs/2402.03606
Autor:
Myung, Yun Soo
We study photon rings of constant scalar hairy black holes with mass $m$, charge $Q$, and scalar hair $S$ obtained from the Einstein-Maxwell-conformally coupled scalar theory. These black holes are classified as scalar hairy Reissner-Nordstr\"{o}m (S
Externí odkaz:
http://arxiv.org/abs/2401.08200
We investigate the tachyonic instability of Kerr-Newman (KN) black hole with a rotation parameter $a$ in the Einstein-Chern-Simons-scalar theory coupled with a quadratic massive scalar field. This instability analysis corresponds to exploring the ons
Externí odkaz:
http://arxiv.org/abs/2401.00144
Autor:
Myung, Yun Soo
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 $ m^2$ a massive
Externí odkaz:
http://arxiv.org/abs/2309.13778
Autor:
Myung, Yun Soo
Stability of Schwarzschild-AdS (SAdS) black hole is investigated in Einstein-Weyl-scalar (EWS) theory with a negative cosmological constant. Here, we introduce a quadratic scalar coupling to the Weyl term, instead of the Gauss-Bonnet term. The linear
Externí odkaz:
http://arxiv.org/abs/2307.14625
Autor:
Myung, Yun Soo
We study the stability of Schwarzschild black hole in Einstein-Weyl-scalar (EWS) theory with a quadratic scalar coupling to the Weyl term. Its linearized theory admits the Lichnerowicz equation for Ricci tensor as well as scalar equation. The lineari
Externí odkaz:
http://arxiv.org/abs/2307.04060
Publikováno v:
Phys.Rev.D 108,084007(2023)
In this paper, we discuss a fully nonlinear mechanism for the formation of scalarized rotating black holes in Einstein-scalar-Gauss-Bonnet gravity, where Kerr black holes are linearly stable, but unstable against nonlinear scalar perturbations. With
Externí odkaz:
http://arxiv.org/abs/2304.08012