Zobrazeno 1 - 10
of 1 913
pro vyhledávání: '"D, Lima"'
Autor:
Magalhães, Renan B., Ribeiro, Gabriel P., Junior, Haroldo C. D. Lima, Olmo, Gonzalo J., Crispino, Luís C. B.
We show that the absence of unbounded algebraic curvature invariants constructed from polynomials of the Riemann tensor cannot guarantee the absence of strong singularities. As a consequence, it is not sufficient to rely solely on the analysis of suc
Externí odkaz:
http://arxiv.org/abs/2401.12779
Within nonlinear electrodynamics (NED), photons follow null geodesics of an effective geometry, which is different from the geometry of the spacetime itself. Over the last years, several works were dedicated to investigate the motion of photons in th
Externí odkaz:
http://arxiv.org/abs/2305.04776
Publikováno v:
Phys. Rev. D 107, 064040 (2023)
We investigate the shadow of an exact black hole solution of Einstein's equations recently proposed by Cardoso et al., to describe a supermassive black hole immersed in a dark matter halo. We analyze and discuss the light rings and the gravitational
Externí odkaz:
http://arxiv.org/abs/2303.17666
We analyze the quasinormal modes (QNMs) of a recently obtained solution of a Schwarzschild black hole (BH) with corrections motivated by Loop Quantum Gravity (LQG). This spacetime is regular everywhere and presents the global structure of a wormhole,
Externí odkaz:
http://arxiv.org/abs/2302.14722
Publikováno v:
Eur. Phys. J. C 82 (2022) 7, 638
We study the scattering of monochromatic planar scalar waves in a geometry that interpolates between the Schwarzschild solution, regular black holes and traversable wormhole spacetimes. We employ the partial waves approach to compute the differential
Externí odkaz:
http://arxiv.org/abs/2211.09886
Autor:
Satvinder Kaur, Nicole Lynch, Yaniv Sela, Janayna D. Lima, Renner C. Thomas, Sathyajit S. Bandaru, Clifford B. Saper
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-17 (2024)
Abstract About half of the neurons in the parabrachial nucleus (PB) that are activated by CO2 are located in the external lateral (el) subnucleus, express calcitonin gene-related peptide (CGRP), and cause forebrain arousal. We report here, in male mi
Externí odkaz:
https://doaj.org/article/569b0bc126514253bde94e0cb5db394e
Black holes can be inserted in very rich astrophysical environments, such as accretion disks. Although isolated black holes are simple objects in general relativity, their accretion disks may significantly enrich the field configurations of their sur
Externí odkaz:
http://arxiv.org/abs/2205.13569
Autor:
Atsushi Kunisaki, Akira Kodama, Masakazu Ishikawa, Takahiro Ueda, Marcio D. Lima, Takeshi Kondo, Nobuo Adachi
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023)
Abstract Carbon nanotubes (CNTs) have the potential to promote peripheral nerve regeneration, although with limited capacity and foreign body reaction. This study investigated whether CNTs hydrophilized by oxidation can improve peripheral nerve regen
Externí odkaz:
https://doaj.org/article/7152de80482f4157a2534b297cf7b631
Autor:
Junior, Haroldo C. D. Lima, Yang, Jian-Zhi, Crispino, Luís C. B., Cunha, Pedro V. P., Herdeiro, Carlos A. R.
The light rings (LRs) topological charge (TC) of a spacetime measures the number of stable LRs minus the number of unstable LRs. It is invariant under smooth spacetime deformations obeying fixed boundary conditions. Asymptotically flat equilibrium bl
Externí odkaz:
http://arxiv.org/abs/2112.10802
Autor:
Jielin Zhu, Bronhilda T. Takeh, Jummy David, Jordan Sang, David M. Moore, Mark Hull, Troy Grennan, Jason Wong, Julio S.G. Montaner, Viviane D. Lima
Publikováno v:
The Lancet Regional Health. Americas, Vol 33, Iss , Pp 100725- (2024)
Summary: Background: Men who have sex with men (MSM) in British Columbia (BC) are disproportionately affected by infectious syphilis and HIV. In this study, we developed a co-interaction model and evaluated the impact and effectiveness of possible in
Externí odkaz:
https://doaj.org/article/ded44a2d13334aedac7cff17dbcc51c0