130 citations · 1.6k across the 87 of their papers we have counts for
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The macroscopic precession model: describing quasi-periodic oscillations including internal structures of test bodies
Gabriele Bianchini, Orlando Luongo, Marco Muccino
The relativistic precession model (RPM) is widely-considered as a benchmark framework to interpret quasi-periodic oscillations (QPOs), albeit several observational inconsistencies…
Cosmological and lunar laser ranging constraints on evolving dark energy in a nonminimally coupled curvature-matter gravity model
Riccardo March, Miguel Barroso Varela, Orfeu Bertolami +3
We analyze a cosmological solution to the field equations of a modified gravity model where curvature and matter are nonminimally coupled. The current Universe's accelerated expans…
Investigating the cosmic distance duality relation with gamma-ray bursts
Anna Chiara Alfano, Carlo Cafaro, Salvatore Capozziello +2
Deviations from the so-called {\it cosmic distance duality relation} may result from systematic errors in distance measurements or, more interestingly, hint at new physics. Further…
Constraints on the Sen black hole mass and charge from quasi-periodic oscillations
Kuantay Boshkayev, Marco Muccino
We analyze quasi-periodic oscillation data from selected X-ray binary systems hosting black holes. To model the spacetime geometry, we resort the static Sen solution -- originally…
Exploring the cosmic microwave background dipole direction using gamma-ray bursts
Orlando Luongo, Marco Muccino, Francesco Sorrenti
We search for dipole variations in the Hubble constant using gamma-ray burst (GRB) data, as such anisotropies may shed light on the Hubble tension. We employ the most recent…
Effects of matter with anisotropic pressure on the Fan-Wang regular black hole shadows
Yergali Kurmanov, Orlando Luongo, Daulet Berkimbayev +4
We here investigate the consequences of an exotic fluid, exhibiting negative radial and tangential pressures, \emph{de facto} violating the Zel'dovich limit, on a regular solution…
Impact of a complex scalar spectator field on baryon asymmetry within spontaneous baryogenesis
Mattia Dubbini, Orlando Luongo, Marco Muccino
We extend the framework of spontaneous baryogenesis by investigating the generation of baryon asymmetry when the inflaton, , is minimally coupled with a complex spectator scalar…
Numerical analysis of quasiperiodic oscillations in the Hartle-Thorne spacetime
K. Boshkayev, T. Konysbayev, Ye. Kurmanov +2
We numerically analyze quasiperiodic oscillations (QPOs) using a well-established spacetime model with neutron star sources. Within the framework of general relativity, we present…
Addressing the tension through matter with pressure and no early dark energy
Youri Carloni, Orlando Luongo, Marco Muccino
We propose that the Hubble tension arises due to an unaccounted additional component, that behaves as \emph{matter with pressure}. We demonstrate that this fluid remains subdominan…
Consequences of non-minimal coupling for mass mixing in spontaneous baryogenesis
Mattia Dubbini, Orlando Luongo, Marco Muccino
We investigate the impact of a non-minimal Yukawa-like coupling between curvature and inflaton field within the \emph{spontaneous baryogenesis} background. We demonstrate that this…
Generalizing the relativistic precession model of quasi-periodic oscillations through anharmonic corrections
Roberto Giambò, Orlando Luongo, Marco Muccino +1
We critically reanalyze the relativistic precession model of quasi-periodic oscillations, exploring its natural extension beyond the standard harmonic approximation. To do so, we s…
Geometric properties versus particle motion in the Fan-Wang spacetime
Gulnara Suliyeva, Kuantay Boshkayev, Talgar Konysbayev +7
In this work, we explore general relativistic effects and geometric properties of the Fan-Wang spacetime, one of the simplest regular solutions that can be obtained in nonlinear el…
Accretion disk luminosity around rotating naked singularities
Yergali Kurmanov, Kuantay Boshkayev, Talgar Konysbayev +6
We explore circular geodesics of neutral test particles in the gravitational field of a rotating deformed mass. The geometry around this source is described by the Quevedo-Mashhoon…