22 citations · 83 across the 19 of their papers we have counts for
18 papers
Disk-like galaxies at 4 < z < 7.7 : JWST/NIRCam morphologies revealed by denoising VAE-GCNN classification
S. S. Mirzoyan, A. Avagyan, V. G. Gurzadyan
Understanding the prevalence of disk-like galaxies at very high redshifts is crucial for constraining the early formation of angular momentum-supported structures. The advent of JW…
Kolmogorov analysis of pulsar TOA
N. Galikyan, A. A. Kocharyan, V. G. Gurzadyan
The Kolmogorov stochasticity parameter (KSP) as a sensitive descriptor of the degree of randomness of signals was used to analyze the properties of the NANOGrav pulsar timing data…
Cosmic voids and the kinetic analysis. V. Hubble tension, the cosmological constant and aperiodic filaments
V. G. Gurzadyan, N. N. Fimin, V. M. Chechetkin
We study the appearance and specific properties of the structures in the local Universe by means of the Vlasov kinetic technique. We consider the role of the cosmological constant…
Focus Point on Tensions in Cosmology from Early to Late Universe: Part II: New Directions in the Light of Observations from the Most Modern Astronomical Facilities
S. Capozziello, E. Di Valentino, V. G. Gurzadyan
The papers included in this Focus Point collection are devoted to the studies on the cosmological tensions and challenges stimulated by the latest observational data. The first res…
On the Earth's tidal perturbations. II. LARES 2 satellite
V. G. Gurzadyan, I. Ciufolini, H. G. Khachatryan +2
Laser-ranging satellites have proved their efficiency in high precision testing of General Relativity and constraining modified gravity theories proposed to explain the dark sector…
Kolmogorov analysis of JWST deep survey galaxies
N. Galikyan, A. A. Kocharyan, V. G. Gurzadyan
JWST galaxy deep spectral surveys provide a unique opportunity to trace a broad range of evolutionary features of galaxies and the intergalactic medium given the huge distance the…
Structure formation in the local Universe and the cosmological constant
V. G. Gurzadyan
The structure formation in the local Universe is considered within the weak-field modification of General Relativity involving the cosmological constant. This approach enables to d…
Cosmic voids and the kinetic analysis. IV. Hubble tension and the cosmological constant
V. G. Gurzadyan, N. N. Fimin, V. M. Chechetkin
The formation of the cosmic structures in the late Universe is considered using Vlasov kinetic approach. The crucial point is the use of the gravitational potential with repulsive…
S2-star dynamics probing the Galaxy core cluster
N. Galikyan, Sh. Khlghatyan, A. A. Kocharyan +1
The star cluster surrounding the supermassive black hole in the center of Milky Way is probed using the data on the S2 star. The value of precession found at the physics-informed n…
Smearing of primordial gravitational waves
M. Samsonyan, A. A. Kocharyan, V. G. Gurzadyan
A mechanism for smearing of the primordial gravitational waves during the radiation-dominated phase of the evolution of the Universe is considered. It is shown that the primordial…
Neural Network Analysis of S2-Star Dynamics: Extended mass
N. Galikyan, Sh. Khlghatyan, A. A. Kocharyan +1
Physics-informed neural network (PINN) analysis of the dynamics of S-stars in the vicinity of the supermassive black hole in the Galactic center is performed within General Relativ…
Neural Network Analysis of S-Star Dynamics: Implications for Modified Gravity
N. Galikyan, Sh. Khlghatyan, A. A. Kocharyan +1
We studied the dynamics of S-stars in the Galactic center using the physics-informed neural networks. The neural networks are considered for both, Keplerian and the General Relativ…
Tidal disruption effects near black holes and Lambda-gravity
A. Stepanian, Sh. Khlghatyan, V. G. Gurzadyan
The tidal disruption of stars in the vicinity of massive black holes is discussed in the context of -gravity. The latter provides an explanation to the Hubble tension as a possi…
On the Galactic CMB apex
V. G. Gurzadyan, A. L. Kashin, A. A. ~Kocharyan +1
The hierarchy of motions that we are participating is well known, from the Earth's motion around the Sun and Sun's motion in the Milky Way, up to the Local Group's motion within th…
Hubble tension and absolute constraints on the local Hubble parameter
V. G. Gurzadyan, A. Stepanian
It is shown, from the two independent approaches of McCrea-Milne and of Zeldovich, that one can fully recover the set equations corresponding to the relativistic equations of the e…
Cosmic voids and induced hyperbolicity. III. tracing redshift dependence
M. Samsonyan, A. A. Kocharyan, A. Stepanian +1
The currently released datasets of the observational surveys reveal the redshift dependence of the physical features of cosmic voids. We study the void induced hyperbolicity, that…
Cosmic voids and induced hyperbolicity. II. Sensitivity to void/wall scales
M. Samsonyan, A. A. Kocharyan, A. Stepanian +1
Cosmic voids as typical under-density regions in the large scale Universe are known for their hyperbolic properties as an ability to deviate the photon beams. The under-density the…
Dark Energy From Vacuum Fluctuations
S. G. Djorgovski, V. G. Gurzadyan
We describe briefly a novel interpretation of the physical nature of dark energy (DE), based on the vacuum fluctuations model by Gurzadyan & Xue, and describe an internally consist…