Research Centre for Theoretical Physics and Astrophysics, Institute of Physics, Silesian University in Opava, Opava, Czech Republic.
Research Interests: gravity; black hole; quasinormal modes; Hawking radiation; General Relativity; gravitational waves.

Department of Physics, Kobe University, Kobe 657-8501, Japan.
Research Interests: gravity; cosmology; gravitational waves; black holes.

Institute of Physics, Carl von Ossietzky University of Oldenburg, D-26111 Oldenburg, Germany.
Research Interests: field theory; gravity; compact objects.

Central European Institute for Cosmology and Fundamental Physics, FZU–Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic.
Research Interests: cosmology; modified gravity; inflation; dark energy; dark matter.

Centro de Matemática, Computação e Cognição (CMCC), Universidade Federal do ABC (UFABC), Rua Abolição, CEP: 09210-180, Santo André, SP, Brazil.
Research Interests: quasinormal modes; gravitational waves; black holes; modified gravity.

Institute of Gravitation and Cosmology, RUDN University, ul. Miklukho-Maklaya 6, Moscow 117198, Russia.
Research Interests: gravitation; black holes; wormholes; singularities; stability; extra dimensions.

Research Interests: non-perturbative QFT; quantum gravity; theoretical cosmology; renormalization group.

Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine, Metrologichna St. 14-b, Kiev 03143, Ukraine.
Research Interests: cosmology; astroparticle physics; gravity; dark matter; dark energy.

Saltenna LLC, 1751 Pinnacle Drive, Suite 600 McLean VA 22102-4903 USA.
Research Interests: electromagnetic metamaterials; surface electromagnetic waves; analog gravity; superconductivity.

Sternberg Astronomical Institute, Moscow State University, 119234 Moscow, Russia.
Research Interests: neutron stars; binary systems; radio pulsars; magnetars; accretion.

Division of Theoretical Physics, Physics Department, University of Ioannina, GR 45500, Greece.
Research Interests: modified theories of gravity; black-hole physics; compact objects; cosmology.

Institute of physics in Opava, Silesian University in Opava, Opava, Czech Republic.
Research Interests: black holes astrophysics; optical effects; cosmology; CMBR temperature anizotropies; numerical relativity.

Institut Denis Poisson, Université de Tours, Parc de Grandmont, Tours, France.
Research Interests: gravity; field theory; black holes; solitons.
