The 'standard'model of cosmology is founded on the basis that the expansion rate of the
universe is accelerating at present—as was inferred originally from the Hubble diagram of …

In this paper, we consider a simple form of expansion history of Universe referred to as the
hybrid expansion law-a product of power-law and exponential type of functions. The ansatz …

Numerous linear expansion cosmological models are critically revised and compared with
standard cosmologies from a historical perspective. There are two major classes of such …

ABSTRACT The use of Type Ia supernovae (SNe Ia) has thus far produced the most reliable
measurement of the expansion history of the universe, suggesting that ΛCDM offers the best …

Modified Newtonian dynamics (MOND) and similar proposals can (at least partially) explain
the excess rotation of galaxies or the equivalent mass-discrepancy acceleration, without (or …

It has been known for over three decades that the monochromatic X-ray and UV luminosities
in quasars are correlated, though non-linearly. This offers the possibility of using high-z …

The cosmic distance duality (CDD) relation (based on the Etherington reciprocity theorem)
plays a crucial role in a wide assortment of cosmological measurements. Attempts at …

Modern cosmological theory is based on the Friedmann–Robertson–Walker (FRW) metric.
Often written in terms of co-moving coordinates, this well-known solution to Einstein's …

Abstract The use of Gaussian Processes with a measurement of the cosmic expansion rate
based solely on the observation of cosmic chronometers provides a completely cosmology …

Context. Cosmic chronometers may be used to measure the age difference between
passively evolving galaxy populations to calculate the Hubble parameter H (z) as a function …