Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Khlghatyan, Sh."'
Publikováno v:
Eur. Phys. J. Plus, 139, 821 (2024)
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 neural networks (PINN) analysis of the S2 data is used to consider the
Externí odkaz:
http://arxiv.org/abs/2409.10567
Publikováno v:
Eur. Phys. J. Plus 139, 246 (2024)
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 Relativity treatment. The aim is to reveal the role of possible extended mass
Externí odkaz:
http://arxiv.org/abs/2403.09748
Publikováno v:
Eur. Phys. J. Plus, 138, 883 (2023)
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 Relativity dynamics, the orbital parameters for stars S1, S2, S9, S13, S31, a
Externí odkaz:
http://arxiv.org/abs/2310.06865
Publikováno v:
Eur. Phys. J. Plus, 137: 965 (2022)
The tidal disruption of stars in the vicinity of massive black holes is discussed in the context of $\Lambda$-gravity. The latter provides an explanation to the Hubble tension as a possible consequence of two Hubble flows, the local and global ones.
Externí odkaz:
http://arxiv.org/abs/2209.03751
Publikováno v:
Eur. Phys. J. Plus 137, 458 (2022)
The property of adiabatic invariance is studied for the generalized potential satisfying the condition of identity of sphere's and point mass's gravity. That function contains a second term corresponding to the cosmological constant as weak-field Gen
Externí odkaz:
http://arxiv.org/abs/2204.06048
Autor:
Khlghatyan, Sh.
Publikováno v:
Eur. Phys. J. Plus 136, 456 (2021)
The dynamics of accretion disk is considered taking into account the Lense-Thirring precession in the presence of cosmological constant $\Lambda$ of Schwarzschild-de Sitter. The nodal and apsidal frequencies are obtained, and the role of $\Lambda$ is
Externí odkaz:
http://arxiv.org/abs/2105.03226
Publikováno v:
Eur. Phys. J. Plus 136, 127 (2021)
We study the black hole's shadow for Schwarzschild - de Sitter and Kerr - de Sitter metrics with the contribution of the cosmological constant \Lambda. Based on the reported parameters of the M87* black hole shadow we obtain constraints for the $\Lam
Externí odkaz:
http://arxiv.org/abs/2101.08261
Publikováno v:
Eur. Phys. Journal C, 80, 1011 (2020)
The geodesics of bound spherical orbits i.e. of orbits performing Lense-Thirring precession, are obtained in the case of the $\Lambda$-term within gravito-electromagnetic formalism. It is shown that the presence of the $\Lambda$-term in the equations
Externí odkaz:
http://arxiv.org/abs/2010.07472
Autor:
Stepanian, A., Khlghatyan, Sh.
Publikováno v:
Eur. Phys. J. Plus 135, 712 (2020)
The orbital Lense-Thirring precession is considered in the context of constraints for weak-field General Relativity involving the cosmological constant $\Lambda$. It is shown that according to the current accuracy of satellite measurements the obtain
Externí odkaz:
http://arxiv.org/abs/2009.01700
Autor:
Khlghatyan, Sh.
Publikováno v:
European Physical Journal Plus; Apr2021, Vol. 136 Issue 4, p1-6, 6p
