The Λ CDM model provides a good fit to most astronomical observations but harbors large
areas of phenomenology and ignorance. With the improvements in the precision and …

The Hubble tension has now grown to a level of significance which can no longer be
ignored and calls for a solution which, despite a huge number of attempts, has so far eluded …

We use the ages of old astrophysical objects (OAO) in the redshift range 0≲ z≲ 8 as
stringent tests of the late-time cosmic expansion history. Since the age of the Universe at any …

We reanalyze in a simple and comprehensive manner the recently released SH0ES data for
the determination of H 0. We focus on testing the homogeneity of the Cepheid+ SnIa sample …

We investigate the redshift dependence of the Hubble tension by comparing the luminosity
distances obtained using an up-to-date BAO dataset (including the latest DESI data) …

The stability of particles in the cosmic soup is an important property that can affect the
cosmic evolution. In this work, we update the constraints on the decaying cold dark matter …

Abstract Decaying Cold Dark Matter (DCDM) is a model that is currently under investigation
regarding primarily the S 8 tension between cosmic microwave background (CMB) and …

Tensions between cosmological parameters (in particular the local expansion rate H 0 and
the amplitude of matter clustering S 8) inferred from low-redshift data and data from the …

We study varying forms of viscous dark matter (DM) and try to address the intriguing tensions
of the standard model of cosmology with recent cosmological data, including the Hubble and …

With the emersion of precise cosmology and the emergence of cosmic tensions, we are
faced with the question of whether the simple model of cold dark matter needs to be …