Zobrazeno 1 - 10
of 183
pro vyhledávání: '"Zen, Freddy P"'
Rotating neutron stars (NSs) are crucial objects of study, as our understanding of them relies significantly on observational data from these rotating stars. Observations suggest that the magnetic fields of NSs range from approximately $10^{8-15}$ G.
Externí odkaz:
http://arxiv.org/abs/2411.11558
Observations reveal that magnetic fields on neutron stars (NSs) are in the range of $10^{8-15}$ G. Apart from being celestial bodies, NSs are normally rotating. In this work, we study the impact of a chaotic magnetic field on the mass-radius relation
Externí odkaz:
http://arxiv.org/abs/2410.11884
Publikováno v:
Int. J. Theor. Phys. 63, 187 (2024)
We investigated the stability of the chameleon screening mechanism in the Brans-Dicke scalar-tensor model. We define a constraint on the Brans-Dicke parameter $\omega_{BD}^*$ identifying two stability groups, $\omega_{BD}>\omega_{BD}^*$ and $0<\omega
Externí odkaz:
http://arxiv.org/abs/2407.21380
Due to rotation, the mass correction of neutron stars arises and causes the rotational mass to be larger than the static mass. In this work, we extend the formulation of the rotational mass of anisotropic neutron stars within Rastall gravity. We appl
Externí odkaz:
http://arxiv.org/abs/2404.01837
Autor:
Trenggana, Anom, Zen, Freddy P.
In this research, we generalize the transformation of the vacuum state that generated gravitational waves in the early universe which is usually transformed using a two-mode into a three-mode Bogoliubov transformation. Based on the calculation of qua
Externí odkaz:
http://arxiv.org/abs/2312.14516
Publikováno v:
Gen Relativ Gravit 56, 90 (2024)
The butterfly velocity of four-dimensional rotating charged asymptotically AdS black hole is calculated to probe chaos using localized rotating shock waves. In this work, we obtain the angular momentum dependence of the butterfly velocity due to rota
Externí odkaz:
http://arxiv.org/abs/2310.14535
We derive Planck's radiation law in a uniformly accelerated frame expressed in Rindler coordinates. The black-body spectrum is time-dependent by its temperature and Planckian at each instantaneous time, but it is scaled by an emissivity factor that d
Externí odkaz:
http://arxiv.org/abs/2309.08833
Publikováno v:
European Physical Journal C, Volume 84, article number 777, (2024)
The Kerr/CFT correspondence has been established to explore the quantum theory of gravity in the near-horizon geometry of a extreme Kerr black holes. The quantum gravitational corrections on the near-horizon region may manifest in form of a partially
Externí odkaz:
http://arxiv.org/abs/2308.08205
We have investigated the decoherence induced by the primordial graviton, using the influence functional method, to show whether this method is still effective in detecting graviton if the initial state is not a Bunch-Davies vacuum but rather a minimu
Externí odkaz:
http://arxiv.org/abs/2305.06534
Publikováno v:
Phys. Rev. D 107, 124053 (2023)
The scrambling time and its delay are calculated using holography in an asymptotically AdS black hole solution of the gauged Einstein-Maxwell-Dilaton-Axion (EMDA) theory, the dyonic Kerr-Sen-AdS$_4$ black hole, perturbed by rotating and charged shock
Externí odkaz:
http://arxiv.org/abs/2304.08751