Black hole shadow to probe modified gravity

Autor:	Stepanian, A., Khlghatyan, Sh., Gurzadyan, V. G.
Rok vydání:	2021
Předmět:	General Relativity and Quantum Cosmology Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj:	Eur. Phys. J. Plus 136, 127 (2021)
Druh dokumentu:	Working Paper
DOI:	10.1140/epjp/s13360-021-01119-2
Popis:	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 $\Lambda$ and show the agreement with the cosmological data. It is shown that, the coupling of the \Lambda-term with the spin parameter reveals peculiarities for the photon spheres and hence for the shadows. Within the parametrized post-Newtonian formalism the constraint for the corresponding \Lambda-determined parameter is obtained. Comment: 7 pages, Eur. Phys. J. Plus (in press)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2101.08261 Zobrazit plný text záznamu View this record from Arxiv