7 papers
Vacuum, ma non troppo: hidden matter distribution in symmetry-transformed electrovacuum spacetimes
Carlos A. R. Herdeiro, João P. A. Novo
We analyse two static spacetimes, recently generated from a Schwarzschild--Bertotti--Robinson electrovacuum seed through distinct symmetry transformations. The electromagnetic fiel…
Photon rings and shadows of Kerr black holes immersed in a swirling universe
Rogério Capobianco, Betti Hartmann, Jutta Kunz +2
We discuss photon rings around as well as shadows of Kerr black holes immersed in a swirling spacetime (KBHSU). We find that the spin-spin interaction between the angular momentum…
Darkness cannot bind them: a no-bound theorem for Myers-Perry null & timelike geodesics
João P. A. Novo
In Newtonian gravity, it is well known that Kepler's problem admits no bound solutions in more than three spatial dimensions. This limitation extends naturally to General Relativit…
Hypershadows of higher dimensional black objects: a case study of cohomogeneity-one d=5 Myers-Perry
João P. A. Novo, Pedro V. P. Cunha, Carlos A. R. Herdeiro
What does a black hole look like? In 1+3 spacetime dimensions, the optical appearance of a black hole is a bidimensional region in the observer's sky often called the black hole sh…
Light rings on stationary axisymmetric spacetimes: blind to the topology and able to coexist
Pedro V. P. Cunha, Carlos A. R. Herdeiro, João P. A. Novo
It has been established that Black Hole (BH) spacetimes obeying some general set of assumptions always possess, at least, one light ring (per rotation sense) [arXiv:2003.06445]. Th…
Kaluza-Klein monopole with scalar hair
Yves Brihaye, Carlos Herdeiro, João P. A. Novo +1
We construct a new family of rotating black holes with scalar hair and a regular horizon of spherical topology, within five dimensional () Einstein's gravity minimally coupled…