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pro vyhledávání: '"Xavier, Sérgio V. M. C. B."'
Ultracompact objects (UCOs) are horizonless compact objects that present light rings (LRs) - circular photon orbits. As a result, they could be black hole mimickers. Some years ago, Cunha et al. established a theorem stating that, under general assum
Externí odkaz:
http://arxiv.org/abs/2404.02208
Publikováno v:
Phys. Rev. D 108, 084060 (2023)
We study the scattering of axially incident massless scalar waves by a charged and rotating black hole solution from heterotic string theory called the Kerr-Sen black hole. We compute the scattering cross section using the partial wave approach, for
Externí odkaz:
http://arxiv.org/abs/2311.12953
Publikováno v:
Phys. Rev. D 107, 064040 (2023)
We investigate the shadow of an exact black hole solution of Einstein's equations recently proposed by Cardoso et al., to describe a supermassive black hole immersed in a dark matter halo. We analyze and discuss the light rings and the gravitational
Externí odkaz:
http://arxiv.org/abs/2303.17666
Autor:
Xavier, Sérgio V. M. C. B.1 (AUTHOR), Benone, Carolina L.2 (AUTHOR) benone@ufpa.br, Crispino, Luís C. B.1 (AUTHOR)
Publikováno v:
European Physical Journal C -- Particles & Fields. Dec2021, Vol. 81 Issue 12, p1-9. 9p.