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gr-qc2013★ 20 cited
The Conformal Stealth of any Standard Cosmology
Eloy Ayón-Beato, Alberto A. García, Pedro Isaac Ramírez-Baca +1
It is shown that any homogeneous and isotropic universe, independently of its spatial topology and matter content, allows for the presence of a conformal stealth, i.e. a nontrivial…
gr-qc2013★ 62 cited
Motion of test particles in a regular black hole space--time
Alberto García, Eva Hackmann, Jutta Kunz +2
We consider the motion of test particles in the regular black hole space-time given by Ayón-Beato and Garc\'ıa in Phys. Rev. Lett. 80:5056 (1998). The complete set of orbits for ne…