Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Maurício Richartz"'
Autor:
Eduardo Albacete, Maurício Richartz
Publikováno v:
Universe, Vol 10, Iss 2, p 62 (2024)
Tidal disruption events occur when astrophysical objects are destroyed by black holes due to strong tidal force effects. Tidal forces have been studied in a variety of black hole spacetimes, including Reissner-Nordström and Kerr spacetimes. Despite
Externí odkaz:
https://doaj.org/article/50794bf459624b1e9717f23bcb2c99b2
Publikováno v:
Physics Letters B, Vol 786, Iss , Pp 442-447 (2018)
The existence of stationary bound states for the hydrodynamic velocity field between two concentric cylinders is established. We argue that rotational motion, together with a trapping mechanism for the associated field, is sufficient to mitigate ener
Externí odkaz:
https://doaj.org/article/911e67a1ff52481a888e4235a68265b3
Autor:
Thiago Cardoso, Maurício Richartz
Inspired by Analogue Gravity, superradiance has been previously investigated in Bose-Einstein condensates (BECs). In this work, we revisit this problem by introducing dissipation to the system. After establishing the possibility of quantum vortices i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37c951287180aea6817d7da9c68ca5d0
http://arxiv.org/abs/2209.02613
http://arxiv.org/abs/2209.02613
We use the continued fraction method to determine the eigenfrequencies associated with a scalar field around a Kerr-like black hole. The Kerr-like metric considered in this article is a subclass of the general parametrization of axisymmetric black ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f81c8f3670a45864a41004db7fafcba1
Publikováno v:
Physical Review D. 104
We define and sketch the generalized ergosphere of the Majumdar-Papapetrou (MP) spacetime. In particular, we demonstrate the existence of closed orbits of negative energy that live outside the event horizon of such a spacetime. Relying on the Penrose
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d7c3be61d8cede13ad8fc9a2ef44d7b
https://doi.org/10.1103/physrevd.104.124025
https://doi.org/10.1103/physrevd.104.124025
Publikováno v:
Physical Review D. 104
We present analogue models for the Schwarzschild and Reissner-Nordstr\"om (RN) spacetimes based on unidirectional hydrodynamic flows. We show that, with appropriate coordinate transformations, sound waves in a moving fluid propagate as scalar fields
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ebf441a1c49e1c8903f6619fe109a0e
https://doi.org/10.1103/physrevd.104.024036
https://doi.org/10.1103/physrevd.104.024036
Publikováno v:
Physical Review Letters. 125
The late stages of the relaxation process of a black hole are expected to depend only on its mass and angular momentum and not on the details of its formation process. Inspired by recent analogue gravity experiments, which demonstrate that certain bl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d9784a8690b7659f76fbbccacc9637a
https://doi.org/10.1103/physrevlett.125.011301
https://doi.org/10.1103/physrevlett.125.011301
Autor:
Sam Patrick, Antonin Coutant, Edmund W. Tedford, Silke Weinfurtner, Maurício Richartz, Theo Torres
Publikováno v:
Nature Physics
Nature Physics, Nature Publishing Group, 2017, 13 (9), pp.833-836. ⟨10.1038/nphys4151⟩
Nature Physics, Nature Publishing Group, 2017, 13 (9), pp.833-836. ⟨10.1038/nphys4151⟩
When an incident wave scatters off of an obstacle, it is partially reflected and partially transmitted. In theory, if the obstacle is rotating, waves can be amplified in the process, extracting energy from the scatterer. Here we describe in detail th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1639ce5f70ac0fa23c639aeb9e29168b
https://doi.org/10.1038/nphys4151
https://doi.org/10.1038/nphys4151
Spectroscopy is a fundamental tool in science which consists in studying the response of a system as a function of frequency. Among its many applications in Physics, Biology, Chemistry and other fields, the possibility of identifying objects and stru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7154f65d7dd75d8f20863cfd81c0b92
Publikováno v:
Physical Review D
Superradiant instabilities can trigger the formation of bosonic clouds around rotating black holes. If the bosonic field growth is sufficiently fast, these clouds could form shortly after a binary black hole merger. Such clouds are continuous sources
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bdebf59a14cb03247f1997b483378a8
http://hdl.handle.net/11573/1284537
http://hdl.handle.net/11573/1284537