Zobrazeno 1 - 10
of 163
pro vyhledávání: '"Salgado, Marcelo"'
We present solutions to the Einstein-Klein Gordon system representing boson stars in the slow rotation approximation. By considering slow rotation we are able to reduce the number of equations yielding a system of ordinary differential equations that
Externí odkaz:
http://arxiv.org/abs/2408.05262
We analyze numerically the dynamical transition to spontaneous scalarization in neutron stars in the framework of a scalar-tensor theory of gravity where the scalar field is free but massive, and it is coupled non minimally to gravity in the Jordan f
Externí odkaz:
http://arxiv.org/abs/2407.08124
Autor:
García, Gustavo, Salgado, Marcelo
In this work we analyze the existence of electrically charged scalar clouds which are bound states of a complex-valued massive scalar field in the background of subextremal and extremal Kerr-Newman black holes (BH). In particular, we reanalyze neutra
Externí odkaz:
http://arxiv.org/abs/2307.15888
We analyze numerically the existence of regular stationary rotating hairy black holes within the framework of general relativity, which are the result of solving the Einstein-Klein-Gordon system for a complex-valued scalar field under suitable bounda
Externí odkaz:
http://arxiv.org/abs/2302.06659
Autor:
García, Gustavo, Salgado, Marcelo
Publikováno v:
Phys. Rev. D 104, 064054 (2021)
In this work we reanalyze the possibility of finding bound states (scalar clouds) of a test, charged and complex-valued scalar field with mass and charge q in the background of a Reissner-Nordstrom black hole (RNBH). In order to determine the existen
Externí odkaz:
http://arxiv.org/abs/2107.06933
It is well known that neutron stars can undergo a phase transition under a certain class of Scalar Tensor Theories of gravity (STT's) where a new order parameter, the {\it scalar charge}, appears within the star. This is the well known phenomenon of
Externí odkaz:
http://arxiv.org/abs/2008.10683
Publikováno v:
Phys. Rev. D 101, 064005 (2020)
Using a novel and self-consistent approach that avoids the scalar-tensor identification in the Einstein frame, we reanalyze the viability of f(R) gravity within the context of solar-system tests. In order to do so, we depart from a simple but fully r
Externí odkaz:
http://arxiv.org/abs/2002.12073
Autor:
Garcia, Gustavo, Salgado, Marcelo
Publikováno v:
Phys. Rev. D 101, 044040 (2020)
We argue about the (non) existence of {\it superregular} scalar clouds (i.e., bound states of a massive and complex-valued scalar field $\Psi$) around exact {\it extremal} ($a = M$) Kerr black holes (BH's) possessing {\it bounded radial derivatives a
Externí odkaz:
http://arxiv.org/abs/1909.12987
Autor:
Hurvitz, Sara A *, Bardia, Aditya, Quiroga, Vanesa, Park, Yeon Hee, Blancas, Isabel, Alonso-Romero, José Luis, Vasiliev, Aleksandr, Adamchuk, Hryhoriy, Salgado, Marcelo, Yardley, Denise A, Berzoy, Oleksandr, Zamora-Auñón, Pilar, Chan, David, Spera, Gonzalo, Xue, Cloris, Ferreira, Erika, Badovinac Crnjevic, Tanja, Pérez-Moreno, Pablo Diego, López-Valverde, Vanesa, Steinseifer, Jutta, Fernando, Tharu M, Moore, Heather M, Fasching, Peter A
Publikováno v:
In The Lancet Oncology September 2023 24(9):1029-1041
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