Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Franzin, Edgardo"'
Autor:
Franzin, Edgardo
Boson stars are self-gravitating solutions made entirely of fundamental massive bosonic fields. Here we investigate mini boson stars in $D$ non-compact spacetime dimensions and we show that they are dynamically unstable for $D>4$.
Comment: 7 pag
Comment: 7 pag
Externí odkaz:
http://arxiv.org/abs/2408.07651
Publikováno v:
Phys. Rev. D 109 (2024) 8, 084028
While non-rotating black-hole solutions are well known in Einstein--\ae{}ther gravity, no axisymmetric solutions endowed with Killing horizons have been so far found outside of the slowly rotating limit. Here we show that the Kerr spacetime is also a
Externí odkaz:
http://arxiv.org/abs/2312.06891
Publikováno v:
Phys. Lett. B 854 (2024) 138750
Nonlinear extensions of classical Maxwell's electromagnetism are among the prominent candidates for theories admitting regular black hole solutions. A quest for such examples has been fruitful, but mostly unsystematic and littered by the introduction
Externí odkaz:
http://arxiv.org/abs/2311.17151
Publikováno v:
JCAP01(2024)020
We study gravitational and test-field perturbations for the two possible families of spherically symmetric black-hole mimickers that smoothly interpolate between regular black holes and horizonless compact objects accordingly to the value of a regula
Externí odkaz:
http://arxiv.org/abs/2310.11990
Publikováno v:
Phys. Rev. D 106, 104060 (2022)
We present a rotating regular black hole whose inner horizon has zero surface gravity for any value of the spin parameter, and is therefore stable against mass inflation. Our metric is built by combining two successful strategies for regularizing sin
Externí odkaz:
http://arxiv.org/abs/2207.08864
Publikováno v:
Phys. Rev. D 107, 044027, 2023
The possible detection of echoes in late gravitational-wave signals is the most promising way to test horizonless alternatives to general relativistic black holes, and probe the physics of these hypothetical ultra-compact objects. While there is curr
Externí odkaz:
http://arxiv.org/abs/2205.14170
Publikováno v:
Phys. Rev. D 105, 124051 (2022)
We study scalar test-field perturbations on top of a Kerr--black-bounce background, i.e. a family of rotating regular black holes and/or rotating traversable wormholes that can mimic Kerr black holes. We compute the quasi-normal modes for a massless
Externí odkaz:
http://arxiv.org/abs/2201.01650
Ongoing observations in the strong-field regime are in optimal agreement with general relativity, although current errors still leave room for small deviations from Einstein's theory. Here we summarise our recent results on superradiance of scalar an
Externí odkaz:
http://arxiv.org/abs/2105.09258
Publikováno v:
JCAP07(2021)036
Given the recent development of rotating black-bounce-Kerr spacetimes, for both theoretical and observational purposes it becomes interesting to see whether it might be possible to construct black-bounce variants of the entire Kerr-Newman family. Spe
Externí odkaz:
http://arxiv.org/abs/2104.11376
Publikováno v:
Phys. Rev. D 103, 104034 (2021)
Recent strong-field regime tests of gravity are so far in agreement with general relativity. In particular, astrophysical black holes appear all to be consistent with the Kerr spacetime, but the statistical error on current observations allows for sm
Externí odkaz:
http://arxiv.org/abs/2102.03152