46 citations · 71 across the 8 of their papers we have counts for
8 papers
PPN--spin degeneracies in mock S62-like stellar-orbit inference
Shant Khlghatyan
We investigate the degeneracies between black hole (BH) spin effects and parametrized post-Newtonian (PPN) parameters in the relativistic orbital dynamics of S2-like and S62-like s…
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…
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…
Black hole shadow to probe modified gravity
A. Stepanian, Sh. Khlghatyan, V. G. Gurzadyan
We study the black hole's shadow for Schwarzschild - de Sitter and Kerr - de Sitter metrics with the contribution of the cosmological constant Λ. Based on the reported parameters o…
Lense-Thirring precession and gravito-gyromagnetic ratio
A. Stepanian, Sh. Khlghatyan, V. G. Gurzadyan
The geodesics of bound spherical orbits i.e. of orbits performing Lense-Thirring precession, are obtained in the case of the -term within gravito-electromagnetic formalism. It i…
Lense-Thirring precession and modified gravity constraints
A. Stepanian, Sh. Khlghatyan
The orbital Lense-Thirring precession is considered in the context of constraints for weak-field General Relativity involving the cosmological constant . It is shown that accord…