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Testing Hořava-Lifshitz gravity using thin accretion disk properties
Tiberiu Harko, Zoltán Kovács, Francisco S. N. Lobo
Recently, a renormalizable gravity theory with higher spatial derivatives in four dimensions was proposed by Horava. The theory reduces to Einstein gravity with a non-vanishing cos…
Can accretion disk properties distinguish gravastars from black holes?
Tiberiu Harko, Zoltán Kovács, Francisco S. N. Lobo
Gravastars, hypothetic astrophysical objects, consisting of a dark energy condensate surrounded by a strongly correlated thin shell of anisotropic matter, have been proposed as an…
Thin accretion disks in stationary axisymmetric wormhole spacetimes
Tiberiu Harko, Zoltán Kovács, Francisco S. N. Lobo
In this paper, we study the physical properties and the equilibrium thermal radiation emission characteristics of matter forming thin accretion disks in stationary axially symmetri…