Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Khoo, Fech Scen"'
We employ a recently developed spectral method to obtain the spectrum of quasinormal modes of rapidly rotating black holes in alternative theories of gravity and apply it to the black holes of shift-symmetric Einstein-scalar-Gauss-Bonnet theory. In t
Externí odkaz:
http://arxiv.org/abs/2412.09377
Quasinormal modes of rapidly rotating black holes are crucial in understanding the ringdown phase after a merger. While for Kerr black holes these modes have been known for a long time, their calculation has remained a challenge in alternative theori
Externí odkaz:
http://arxiv.org/abs/2407.20760
Publikováno v:
Phys. Rev. D 109, 124051 (2024)
We consider slowly rotating Ellis-Bronnikov wormholes and investigate their radial perturbations ($\mathrm{l}=0$), expanding up to second order in rotation. We present the detailed derivations in the general case, including symmetric and non-symmetri
Externí odkaz:
http://arxiv.org/abs/2403.08387
Autor:
Khoo, Fech Scen, Azad, Bahareh, Blázquez-Salcedo, Jose Luis, González-Romero, Luis Manuel, Kleihaus, Burkhard, Kunz, Jutta, Navarro-Lérida, Francisco
Publikováno v:
Phys. Rev. D 109, 084013 (2024)
We present for the first time a study of the quasinormal modes of rapidly rotating Ellis-Bronnikov wormholes in General Relativity. We compute the spectrum of the wormholes using a spectral decomposition of the metric perturbations on a numerical bac
Externí odkaz:
http://arxiv.org/abs/2401.02898
Publikováno v:
Phys. Rev. D 109, 064028 (2024)
We report a new method to calculate the quasinormal modes of rotating black holes, using a spectral decomposition to solve the partial differential equations that result from introducing linear metric perturbations to a rotating background. Our appro
Externí odkaz:
http://arxiv.org/abs/2312.10754
Autor:
Timmer, Roelien C., Khoo, Fech Scen, Mark, Megan, Martins, Marcella Scoczynski Ribeiro, Berea, Anamaria, Renard, Gregory, Bugbee, Kaylin
The size of the National Aeronautics and Space Administration (NASA) Science Mission Directorate (SMD) is growing exponentially, allowing researchers to make discoveries. However, making discoveries is challenging and time-consuming due to the size o
Externí odkaz:
http://arxiv.org/abs/2303.10871
We investigate the radial perturbations of Ellis-Bronnikov wormholes ($\mathrm{l}=0$) in a slowly rotating background expanded up to second order in rotation. We find indications that simple wormhole solutions such as Ellis-Bronnikov in General Relat
Externí odkaz:
http://arxiv.org/abs/2301.05243
Publikováno v:
Phys. Rev. D 107, 084031 (2023)
We calculate the spectrum of quasinormal modes of slowly rotating Kerr-Newman black holes. Using a perturbative double expansion method, second order in rotation and first order in non-radial perturbations, we obtain the system of equations that desc
Externí odkaz:
http://arxiv.org/abs/2212.00054
Autor:
Blázquez-Salcedo, Jose Luis, González-Romero, Luis Manuel, Khoo, Fech Scen, Kunz, Jutta, Preut, Vincent
Publikováno v:
Front.Astron.Space Sci. 9 (2022) 1005108
Scalar-tensor theories allow for a rich spectrum of quasinormal modes of neutron stars. The presence of the scalar field allows for polar monopole and dipole radiation, as well as for additional higher multipole modes led by the scalar field. Here we
Externí odkaz:
http://arxiv.org/abs/2207.11370
Publikováno v:
Front. Phys. 9:741427 (2021)
We study polar quasinormal modes of relativistic stars in scalar-tensor theories, where we include a massive gravitational scalar field and employ the standard Brans-Dicke coupling function. For the potential of the scalar field we consider a simple
Externí odkaz:
http://arxiv.org/abs/2107.06726