Zobrazeno 1 - 10
of 66
pro vyhledávání: '"de Araújo, José C."'
Publikováno v:
Eur.Phys.J.C 84 (2024) 302
The Kerr spacetime is a fundamental solution of general relativity (GR), describing the gravitational field around a rotating, uncharged black hole (BH). Kerr spacetime has been crucial in modern astrophysics and it serves as a foundation for the stu
Externí odkaz:
http://arxiv.org/abs/2403.17718
Publikováno v:
The European Physical Journal C, Volume 83, article number 1168, (2023)
The Teleparallel Theory is equivalent to General Relativity, but whereas in the latter gravity has to do with curvature, in the former gravity is described by torsion. As is well known, there is in the literature a host of alternative theories of gra
Externí odkaz:
http://arxiv.org/abs/2308.00627
Autor:
de Lima, Rafael C. R., Pereira, Jonas P., Coelho, Jaziel G., Nunes, Rafael C., Stecchini, Paulo E. F., Castro, Manuel, Gomes, Pierre, da Silva, Rodrigo R., Rodrigues, Claudia V., de Araujo, José C. N., Bejger, Michał, Haensel, Paweł, Zdunik, J. Leszek
3XMM J185246.6+003317 is a transient magnetar located in the vicinity of the supernova remnant Kes\,79. So far, observations have only set upper limits to its surface magnetic field and spindown, and there is no estimate for its mass and radius. Usin
Externí odkaz:
http://arxiv.org/abs/2210.06648
We discuss some aspects of Sousa et al.(2020a, 2020b) concerning two mechanisms of gravitational wave (GW) emission in fast-spinning white dwarfs (WDs): accretion of matter and magnetic deformation. In both cases, the GW emission is generated by an a
Externí odkaz:
http://arxiv.org/abs/2110.00344
Publikováno v:
International Journal of Modern Physics D, Vol. 31, No. 13, 2250101 (2022)
There are many ways to probe alternative theories of gravity, namely, via: experimental tests at solar system scale, cosmological data and models, gravitational waves and compact objects. In the present paper we consider a model of gravity with torsi
Externí odkaz:
http://arxiv.org/abs/2109.01155
Publikováno v:
Phys. Rev. D 104, 104057 (2021)
We investigate the Minimal Theory of Massive Gravity (MTMG) in the light of different observational data sets which are in tension within the $\Lambda$CDM cosmology. In particular, we analyze MTMG model, for the first time, with the Planck-CMB data,
Externí odkaz:
http://arxiv.org/abs/2106.09595
Publikováno v:
ApJ 920 57 (2021)
As is well known, pulsars are extremely stable rotators. However, although slowly, they spin down thanks to brake mechanisms, which are in fact still subject of intense investigation in the literature. Since pulsars are usually modelled as highly mag
Externí odkaz:
http://arxiv.org/abs/2105.11957
Publikováno v:
Eur. Phys. J. C 80, 1115 (2020)
Neutron stars (NSs) are excellent natural laboratories to constrain gravity on strong field regime and nuclear matter in extreme conditions. Motivated by the recent discovery of a compact object with $2.59^{+0.08}_{-0.09} M_\odot$ in the binary merge
Externí odkaz:
http://arxiv.org/abs/2008.10395
Two mechanisms of gravitational waves (GWs) emission in fast-spinning white dwarfs (WDs) are investigated: accretion of matter and magnetic deformation. In both cases, the GW emission is generated by an asymmetry around the rotation axis of the star.
Externí odkaz:
http://arxiv.org/abs/2001.08534
Autor:
Fullhart, Andrew, Goodrich, David C., Meles, Menberu B., Oliveira, Paulo Tarso S., Almeida, Cristiano das Neves, de Araújo, José C., Burns, Shea
Publikováno v:
In International Soil and Water Conservation Research December 2023 11(4):726-742
