Shadow cast by a Kaluza-Klein spinning dilaton black hole (en prensa)

LEONARDO AMARILLA; ERNESTO F. EIROA

Buenos Aires

Conferencia; Gravitation, Relativistic Astrophysics and Cosmology: Second Argentinian-Brazilian Meeting; 2014

We examine the shadow of a rotating Kaluza-Klein black hole in Einstein gravity coupled to a Maxwell field and a dilaton. The size and the shape of the shadow depend on the mass, the charge, and the angular momentum of the compact object. For a given mass, the size increases with the rotation parameter and decreases with the electric charge. The distortion with respect to the non rotating case grows with the charge and the rotation parameter. For fixed values of these parameters, the shadow is slightly larger and less deformed than in the Kerr-Newman case.