19 citations · 39 across the 7 of their papers we have counts for
7 papers
Distorted black holes: nonextensivity in the gravitational wave emission
H. P. de Oliveira
We investigate the interaction between a non-rotating black hole and incoming gravitational waves using the characteristic formulation of the Einstein field equations, framed as a…
Similarity in the Arnowitt-Deser-Misner Mass from Brill and Teukolsky Initial Data Sets Beyond the Linear Approximation
R. F. Aranha, H. P. de Oliveira
The two most common initial data for vacuum axisymmetric spacetimes are the Brill and Teukolsky gravitational waves. The subsequent numerical evolution of these data exhibits disti…
Baumgarte-Shapiro-Shibata-Nakamura formalism in cylindrical coordinates: Brill and Teukolsky waves in both linear and nonlinear regimes
M. A. Alcoforado, R. F. Aranha, H. P. de Oliveira
In this article we present a numerical code, based on the collocation or pseudospectal method, which integrates the equations of the BSSN formalism in cylindrical coordinates. In o…
Bona-Masso slicing conditions and the lapse close to black-hole punctures
Thomas W. Baumgarte, Henrique P. de Oliveira
We consider several families of functions that appear in the Bona-Masso slicing condition for the lapse function . Focusing on spherically symmetric and time-independent…
The affine-null formulation of the gravitational equations: spherical case
J. A. Crespo, H. P. de Oliveira, J. Winicour
A new evolution algorithm for the characteristic initial value problem based upon an affine parameter rather than the areal radial coordinate used in the Bondi-Sachs formulation is…
Aspects of wave turbulence in preheating III: The case of the two-fields models
J. A. Crespo, H. P. de Oliveira
The present work is the continuation of the investigation of aspects of wave turbulence in preheating we have started in Refs. [1, 2] but considering several classes of inflationar…
The collision of two-kinks revisited: the creation of kinks and lump-like defects as metastable states
T. S. Mendonça, H. P. de Oliveira
We present a more detailed numerical investigation of the head-on collision of a two-kink/two-antikink system. We identified the escape of oscillon-like configurations as a pair of…