Universe, Volume 6, Issue 4

The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) has produced massive medium-resolution spectra. Data mining for special and rare stars in massive LAMOST spectra is of great significance. Feature extraction plays an important ro...

Black holes are fantastic laboratories for probing new physics. Both theoretically and experimentally, many new ideas are emerging to use them as tools for understanding better quantum gravity or classical gravity beyond general relativity. I briefly...

It is well-known that static vacuum solutions of Einstein equations are analytic in suitable coordinates. We ask here for an extension of this result in the context of Finsler gravity. We consider Finsler spacetimes that retain several properties of...

The work presented in this paper aims to contribute to the problem of testing Finsler gravity theories by means of experiments and observations in the solar system. Within a class of spherically symmetric static Finsler spacetimes we consider a satel...

We derive generalised uncertainty relations (GURs) for orbital angular momentum and spin in the recently proposed smeared-space model of quantum geometry. The model implements a minimum length and a minimum linear momentum and recovers both the gener...

Narrow-line Seyfert 1 galaxies (NLSy1s) are a well established class of $\gamma$ -ray sources, showing the presence of a jet like the more common flat-spectrum radio quasars. The evidence of $\gamma$ -ray emission poses the issue of the locat...

Physical foundations for relativistic spacetimes are revisited in order to check at what extent Finsler spacetimes lie in their framework. Arguments based on inertial observers (as in the foundations of special relativity and classical mechanics) are...

At the second post-Newtonian (2PN) order, the secular pericenter precession ${\dot{\omega }}^{2\mathrm{PN}}$ of either a full two-body system made of well-detached non-rotating monopole masses of comparable size and a restricted two-body system composed...

After a long a glorious history, marked by the first direct proofs of neutrino existence and of the mixing between the first and third neutrino generations, the reactor antineutrino experiments are still well alive and will continue to give important...

As nano-scale metal-oxide-semiconductor devices are cooled to temperatures below 1 K, detrimental effects due to unintentional dots become apparent. The reproducibility of the location of these unintentional dots suggests that there are other mechani...

We study a quantization via fractional derivative of a nonminimal derivative coupling cosmological theory, namely, the Fab Four John theory. Its Hamiltonian version presents the issue of fractional powers in the momenta. That problem is solved here b...

In this paper, we have explored non-gravitational interaction dark energy model between dark energy and cold dark matter (CDM). The main purpose of this work is to explore the deviations from $\mathsf{\Lambda }CDM$ and to distinguish the evolution tr...

The current paper is devoted to investigating wormhole solutions with an exponential gravity model in the background of $f\left(\mathcal{R}\right)$ theory. Spherically symmetric static spacetime geometry is chosen to explore wormhole solutions with anisotropic f...