5 papers
Einstein-Maxwell fields as solutions of Einstein gravity coupled to conformally invariant non-linear electrodynamics
Marcello Ortaggio
We study Einstein-Maxwell (non-null) sourcefree configurations that can be extended to any conformally invariant non-linear electrodynamics (CINLE) by a constant rescaling of the e…
On type II(D) Einstein spacetimes in six dimensions
David Kokoška, Marcello Ortaggio
After a concise overview of Einstein spacetimes of type II (or more special) in four and five dimensions, we summarize recent results in the six-dimensional case. We assume the opt…
Ultrarelativistic boost of a black hole in the magnetic universe of Levi-Civita--Bertotti--Robinson
Marcello Ortaggio, Marco Astorino
We consider an exact Einstein-Maxwell solution constructed by Alekseev and Garcia which describes a Schwarzschild black hole immersed in the magnetic universe of Levi-Civita, Berto…
On the uniqueness of the Kerr-(A)dS metric as a type II(D) solution in six dimensions
David Kokoška, Marcello Ortaggio
We study the class of six-dimensional -vacuum spacetimes which admit a non-degenerate multiple Weyl aligned null direction l (thus being of Weyl type~II or more special) with a…
All non-expanding gravitational waves in -dimensional (anti-)de Sitter space
Marcello Ortaggio, Jakub VoldÅich, José Barrientos
We present a complete, theory-independent classification of -dimensional Kundt spacetimes of Weyl and traceless-Ricci type N. We show that these geometries consist of three inva…