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J-PAS: The Javalambre-Physics of the Accelerated Universe Astrophysical Survey
The Javalambre-Physics of the Accelerated Universe Astrophysical Survey (J-PAS) is a narrow band, very wide field Cosmological Survey to be carried out from the Javalambre Observatory in Spain with a
Homogeneity of Riemannian space-times of Gödel type
The conditions for space-time homogeneity of a Riemannian manifold with a Goedel-type metric are examined. The Raychaudhuri-Thakurta necessary conditions for space-time homogeneity are shown to be
Energy conditions bounds on f(T) gravity
In the standard approach to cosmological modeling in the framework of general relativity, the energy conditions play an important role in the understanding of several properties of the Universe,
Energy conditions and cosmic acceleration
In general relativity, the energy conditions are invoked to restrict general energy-momentum tensors ${T}_{\ensuremath{\mu}\ensuremath{\nu}}$ in different frameworks, and to derive general results
Energy conditions and supernovae observations
In general relativity, the energy conditions are invoked to restrict general energy-momentum tensors ${T}_{\ensuremath{\mu}\ensuremath{\nu}}$ on physical grounds. We show that in the standard
Lookback time bounds from energy conditions
I. IN T R O D U C T IO N The standard Friedm ann-Lem a^�tre-Robertson-W alker (FLRW ) approach to m odelthe Universe begins with two basic assum ptions. First,itisassum ed thatour3{ dim
Stability of a rotating universe
We present an exact cosmological solution of Einstein's equation which has expansion, shear, and rotation. The source of this geometry is a fluid which has not been thermalized. The model tends
Homogeneous Gödel-type solutions in hybrid metric-Palatini gravity
The hybrid metric-Palatini $$f({\mathscr {R}})$$f(R) gravity is a recently devised approach to modified gravity in which it is added to the metric Ricci scalar R, in the Einstein–Hilbert Lagrangian,
Energy conditions bounds and their confrontation with supernovae data
The energy conditions play an important role in the understanding of several properties of the Universe, including the current accelerating expansion phase and the possible existence of the so-called
Time travel in the homogeneous Som-Raychaudhuri universe
Abstract Properties of the rotating Som-Raychaudhuri homogeneous space-time are investigated: time-like and null geodesics, causality features, horizons and invariant characterization. An integral
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