65 citations · 174 across the 8 of their papers we have counts for
6 papers · 1 filter
Zero expansion is not free: the sharp minimum of Eulerian negative energy in Natário warp drives
Nelson Bolívar, Ivaylo Vasilev, Gabriel Abellán
Natário's warp drive replaces the contraction and expansion of the Alcubierre bubble by a divergence-free shift. We determine exactly how much Eulerian negative energy this constru…
Boundary Obstructions and Lapse Freedom in Static Spherical Hollow Cores
Nelson Bolívar, Gabriel Abellán, Ivaylo Vasilev
We analyze a sharply delimited comparison problem for a static spherical hollow core: an empty, flat cavity surrounded by a positive matter wall. In the unit-lapse, flat-slice radi…
A Generalized Double Chaplygin Model for Anisotropic Matter: The Newtonian Case
Gabriel Abellán, Angel Rincon, Eduard Sanchez
In this work, we investigate astrophysical systems in a Newtonian regime using anisotropic matter. For this purpose, we considered that both radial and tangential pressures satisfy…
Uncharged and charged anisotropic like--Durgapal stellar model with vanishing complexity
E. Contreras, E. Fuenmayor, G. Abellán
In this work we use the vanishing complexity factor as a supplementary condition to construct uncharged and charged like--Durgapal models. We provide the component of the…
The general relativistic double polytrope for anisotropic matter
G. Abellan, E. Fuenmayor, E. Contreras +1
A general formalism recently proposed to study Newtonian polytropes for anisotropic fluids is here extended to the relativistic regime. Thus, it is assumed that a polytropic equati…
The double polytrope for anisotropic matter: Newtonian Case
G. Abellan, E. Fuenmayor, L. Herrera
A general formalism developed few years ago to model polytropic Newtonian stars with anisotropic pressure is applied to model stars for which, both, radial and tangential pressure…