A new accelerating cosmology driven only by baryons plus cold dark matter (CDM) is
proposed in the framework of general relativity. In this scenario the present accelerating …

The age problem in the ΛCDM model is re-examined. We define the elapsed time T of an
object as its age plus the age of the Universe when it was born. Therefore in any cosmology …

A cosmic scenario with gravitationally induced particle creation is proposed. In this model
the Universe evolves from an early to a late time de Sitter era, with the recent accelerating …

Recent determinations of the Hubble constant, H 0, at extremely low and very high redshifts
based on the cosmic distance ladder (grounded with trigonometric parallaxes) and a …

Many dark energy models fail to pass the cosmic age test. In this paper, we investigate the
cosmic age problem associated with nine extremely old Global Clusters (GCs) and the old …

Since it can describe the rotation curves of galaxies without dark matter and can give rise to
accelerated expansion, conformal gravity attracts much attention recently. As a theory of …

The observed accelerated cosmic expansion can be a signature of fourth-order gravity
theories, where the acceleration of the Universe is a consequence of departures from …

In this article, with an overview to the dynamics of the homogeneous and isotropic
cosmology for the usual and phantom scalar fields, we investigate the model of …

In order to clarify the tension between estimates of the Hubble Constant (H 0) from local (z≪
1) and global (z≫ 1) measurements, Lima and Cunha (LC) proposed a new method to …

The most recent Hubble constant (H 0) estimates from local methods (z≪ 1), H 0= 73.8±2.4
km s− 1 Mpc− 1, and the one from high redshifts, H 0= 67.3±1.2 km s− 1 Mpc− 1, are …