Zobrazeno 1 - 10
of 115
pro vyhledávání: '"Destounis, Kyriakos"'
The quasinormal mode spectrum of black holes plays a crucial role in the modelling of post-merger ringdown signals. However, the spectrum is extremely sensitive to small deformations of the system and describes the linear response only in a certain (
Externí odkaz:
http://arxiv.org/abs/2406.01692
Autor:
Boyanov, Valentin, Cardoso, Vitor, Destounis, Kyriakos, Jaramillo, José Luis, Macedo, Rodrigo Panosso
Black holes in anti-de Sitter spacetime provide an important testing ground for both gravitational and field-theoretic phenomena. In particular, the study of perturbations can be useful to further our understanding regarding certain physical processe
Externí odkaz:
http://arxiv.org/abs/2312.11998
Publikováno v:
Phys. Rev. D 109, 044023 (2024)
Pseudospectral analyses have broadened our understanding of ringdown waveforms from binary remnants, by providing insight into both the stability of their characteristic frequencies under environmental perturbations, as well as the underlying transie
Externí odkaz:
http://arxiv.org/abs/2312.11630
Autor:
Destounis, Kyriakos, Duque, Francisco
Black-hole spectroscopy is a powerful tool to probe the Kerr nature of astrophysical compact objects and their environment. The observation of multiple ringdown modes in gravitational waveforms could soon lead to high-precision gravitational-wave spe
Externí odkaz:
http://arxiv.org/abs/2308.16227
Publikováno v:
Phys. Rev. D 108, 104027 (2023)
Recent studies have shown that quasinormal modes suffer from spectral instabilities, a frailty of black holes that leads to disproportional migration of their spectra in the complex plane when black-hole effective potentials are modified by minuscule
Externí odkaz:
http://arxiv.org/abs/2307.11155
Publikováno v:
Gen Relativ Gravit 55, 123 (2023)
X-ray astronomy provides information regarding the electromagnetic emission of active galactic nuclei and X-ray binaries. These events provide details regarding the astrophysical environment of black holes and stars, and help us understand gamma-ray
Externí odkaz:
http://arxiv.org/abs/2305.18522
Publikováno v:
Phys. Rev. D 108 (2023) 8, 084062
General relativity predicts that black holes are described by the Kerr metric, which has integrable geodesics. This property is crucial to produce accurate waveforms from extreme-mass-ratio inspirals. Astrophysical environments, modifications of grav
Externí odkaz:
http://arxiv.org/abs/2305.05691
Publikováno v:
Gen Relativ Gravit 55, 71 (2023)
Due to the growing capacity of gravitational-wave astronomy and black-hole imaging, we will soon be able to emphatically decide if astrophysical objects lurking in galactic centers are black holes. Sgr A*, one of the most prolific astronomical radio
Externí odkaz:
http://arxiv.org/abs/2301.11483
Publikováno v:
Phys. Rev. D 107, 104038 (2023)
Analog models of black holes have unequivocally proven to be extremely beneficial in providing critical information regarding black hole spectroscopy, superradiance, quantum phenomena and most importantly Hawking radiation and black hole evaporation;
Externí odkaz:
http://arxiv.org/abs/2301.11480
Publikováno v:
Phys. Rev. D 107, 084027 (2023)
Circumambient and galactic-scale environments are intermittently present around black holes that reside in active galactic nuclei. As supermassive black holes impart energy on their host galaxy, so the galactic environment affects the dynamics of sol
Externí odkaz:
http://arxiv.org/abs/2210.09357