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pro vyhledávání: '"Cho, Inyong"'
Autor:
Cho, Inyong, Shaikh, Rajibul
Publikováno v:
JCAP 07 (2024) 025
We study the homogeneous and anisotropic evolution of Bianchi type-I spacetime driven by perfect fluid with shear viscosity. We obtain exact solutions by considering the simplest form of the equation of state wherein the pressure and the shear stress
Externí odkaz:
http://arxiv.org/abs/2404.06934
Autor:
Cho, Inyong, Shaikh, Rajibul
Publikováno v:
Chinese Journal of Physics 87, 452-464 (2024)
We investigate the anisotropic evolution of spacetime driven by perfect fluid with off-diagonal shear-viscosity components. We consider the simplest form of the equation of state for fluid, for which the pressure and the shear stress are proportional
Externí odkaz:
http://arxiv.org/abs/2209.12544
We investigate the second-order effective energy-momentum tensor (2EMT) constructed by the quadratic terms of the linear scalar cosmological perturbations while the universe is dominated by a scalar field. We show that 2EMT is gauge dependent. We the
Externí odkaz:
http://arxiv.org/abs/2206.11530
Autor:
Cho, Inyong, Shaikh, Rajibul
Publikováno v:
In Chinese Journal of Physics February 2024 87:452-464
Autor:
Cho, Inyong, Park, Dong-Ho
Recently neutral and charged black-hole solutions were found for static perfect fluid with the equation of state $p(r)=-\rho(r)/3$, for fluid only as well as for fluid in the presence of electric field. In those works, the stability of the black hole
Externí odkaz:
http://arxiv.org/abs/2006.11777
Publikováno v:
Phys. Rev. D 102, 043531 (2020)
We investigate the second-order gravitational scalar perturbations for a barotropic fluid. We derive the effective energy-momentum tensor described by the quadratic terms of the gravitational and the matter perturbations. We show that the second-orde
Externí odkaz:
http://arxiv.org/abs/2003.12279
Autor:
Cho, Inyong
We investigate the gravitational field of static perfect-fluid in the presence of electric field. We adopt the equation of state $p(r)=-\rho(r)/3$ for the fluid in order to consider the closed ($S_3$) or the open ($H_3$) background spatial topology.
Externí odkaz:
http://arxiv.org/abs/1712.00577
Autor:
Cho, Inyong, Kim, Hyeong-Chan
We study a spherically symmetric spacetime made of anisotropic fluid of which radial equation of state is given by $p_1 = -\rho$. This provides analytic solutions and a good opportunity to study the static configuration of black hole plus matter. For
Externí odkaz:
http://arxiv.org/abs/1703.01103
Autor:
Cho, Inyong, Kim, Hyeong-Chan
Publikováno v:
Phys. Rev. D 95, 084052 (2017)
We investigate black holes formed by static perfect fluid with $p=-\rho/3$. These represent the black holes in $S_3$ and $H_3$ spatial geometries. There are three classes of black-hole solutions, two $S_3$ types and one $H_3$ type. The interesting so
Externí odkaz:
http://arxiv.org/abs/1610.04087
Autor:
Cho, Inyong, Gong, Jinn-Ouk
Publikováno v:
Phys. Rev. D 92, 064046 (2015)
We investigate the scalar and tensor spectral indices of the quadratic inflation model in Eddington-inspired Born-Infeld (EiBI) gravity. We find that the EiBI corrections to the spectral indices are of second and first order in the slow-roll approxim
Externí odkaz:
http://arxiv.org/abs/1506.07061