125 citations · 530 across the 18 of their papers we have counts for
18 papers
In-Stabilities of massive white dwarfs in modified gravity
Ronaldo V. Lobato, Geanderson A. Carvalho, Neelima G. Kelkar +1
Super-Chandrasekhar white dwarfs are a timely topic in the last years in the scientific community due to its connection to supernovae type Ia (SN Ia). Some early studies tackled th…
Orbital decay of double white dwarfs: beyond gravitational wave radiation effects
G. A. Carvalho, R. C. dos Anjos, J. G. Coelho +6
The traditional description of the orbital evolution of compact-object binaries, like double white dwarfs (DWDs), assumes that the system is driven only by gravitational wave (GW)…
Massive white dwarfs in gravity
R. V. Lobato, G. A. Carvalho, N. G. Kelkar +1
In this work, we investigate the equilibrium configurations of massive white dwarfs (MWD) in the context of modified gravity, namely gravity, where stands for the Ri…
An updated view and perspectives on high-energy gamma-ray emission from SGR J1935+2154 and its environment
Jaziel G. Coelho, Luana N. Padilha, Rita C. dos Anjos +2
SGR J1935+2154 was discovered in 2016 and is currently one of the most burst-active Soft Gamma-ray Repeaters (SGR), having emitted several X-ray bursts in recent years. In one of o…
Quark stars with 2.6 in a non-minimal geometry-matter coupling theory of gravity
G. A. Carvalho, R. Lobato, P. H. R. S. Moraes +2
This work analyses the hydrostatic equilibrium configurations of strange stars in a non-minimal geometry-matter coupling (GMC) theory of gravity. Those stars are made of strange qu…
Neutron stars in gravity with realistic equations of state: joint-constrains with GW170817, massive pulsars, and the PSR J0030+0451 mass-radius from data
R. V. Lobato, G. A. Carvalho, C. A. Bertulani
In this work we investigate neutron stars (NS) in theory of gravity for the case , wher…
X-ray photolysis of CHCOCH ice: Implications for the radiation effects of compact objects towards astrophysical ices
G. A. Carvalho, S. Pilling
In this study, we employed broadband X-rays ( eV) to irradiate the frozen acetone CHCOCH, at the temperature of 12 K, with different photon fluences up to $2.7\time…
General approach to the Lagrangian ambiguity in gravity
G. A. Carvalho, F. Rocha, H. O. Oliveira +1
The gravity is a theory whose gravitational action depends arbitrarily on the Ricci scalar, , and the trace of the stress-energy tensor, ; its field equations also d…
Strange stars in energy-momentum-conserved gravity
G. A. Carvalho, S. I. dos Santos, P. H. R. S. Moraes +1
For the accurate understanding of compact objects such as neutron stars and strange stars, the Tolmann-Openheimer-Volkof (TOV) equation has proved to be of great use. Hence, in thi…
Study of the charged super-Chandrasekhar limiting mass white dwarfs in the gravity
F. Rocha, G. A. Carvalho, D. Deb +1
The equilibrium configuration of white dwarfs composed of a charged perfect fluid are investigated in the context of the gravity, for which and …
Extra dimensions' influence on the equilibrium and radial stability of strange quark stars
José D. V. Arbañil, Geanderson A. Carvalho, Ronaldo V. Lobato +2
We analyze the influence of extra dimensions on the static equilibrium configurations and stability against radial perturbations. For this purpose, we solve stellar structure equat…
Hydrostatic equilibrium configurations of neutron stars in a non-minimal geometry-matter coupling theory of gravity
G. A. Carvalho, P. H. R. S. Moraes, S. I. dos Santos +2
In this work we analyze hydrostatic equilibrium configurations of neutron stars in a non-minimal geometry-matter coupling (GMC) theory of gravity. We begin with the derivation of t…
Compact Astrophysical Objects in gravity
P. H. R. S. Moraes, J. D. V. Arbañil, G. A. Carvalho +4
In this article we study the hydrostatic equilibrium configuration of neutron stars (NSs) and strange stars (SSs), whose fluid pressure is computed from the equations of state $p=ω…
White dwarfs with a surface electrical charge distribution: Equilibrium and stability
G. A. Carvalho, José D. V. Arbañil, R. M. Marinho +1
The equilibrium configuration and the radial stability of white dwarfs composed of charged perfect fluid are investigated. These cases are analyzed through the results obtained fro…
Energy nonconservation as a link between gravity and noncommutative quantum theory
Ronaldo V. Lobato, G. A. Carvalho, A. G. Martins +1
gravity was proposed as an extension of the theories, containing not just geometrical correction terms to the General Relativity equations, but also material correc…
A conservative energy-momentum tensor in the gravity and its implications for the phenomenology of neutron stars
S. I. dos Santos, G. A. Carvalho, P. H. R. S. Moraes +1
The solutions for the Tolmann-Oppenheimer-Volkoff (TOV) equation bring valuable informations about the macroscopical features of compact astrophysical objects as neutron stars. The…
General Relativistic effects in the structure of massive white dwarfs
G. A. Carvalho, R. M. Marinho, M. Malheiro
In this work we investigate the structure of white dwarfs using the Tolman-Oppenheimer-Volkoff equations and compare our results with those obtained from Newtonian equations of gra…
Stellar equilibrium configurations of white dwarfs in the gravity
G. A. Carvalho, R. V. Lobato, P. H. R. S. Moraes +4
In this work we investigate the equilibrium configurations of white dwarfs in a modified gravity theory, na\-mely, gravity, for which and stand for the Ricci scala…