Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Flávio S Coelho"'
Autor:
Flávio S. Coelho, Marco O. P. Sampaio
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
We analyse the causal structure of the two dimensional (2D) reduced background used in the perturbative treatment of a head-on collision of two $D$-dimensional Aichelburg-Sexl gravitational shock waves. After defining all causal boundaries, namely th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7062c5ad762c8f182dea029fb7499939
Publikováno v:
The Thirteenth Marcel Grossmann Meeting.
Publikováno v:
The Thirteenth Marcel Grossmann Meeting.
We consider the radiation emitted in a collision of shock waves, in D-dimensional General Relativity (GR), and describe a remarkably simple pattern, hinting at a more fundamental structure, unveiled by the introduction of the parameter D.
Autor:
Flávio S. Coelho, Helvi Witek, Pablo Laguna, Enrico Barausse, C.P. Burgess, Juan Carlos Degollado, Burkhard Kleihaus, João G. Rosa, Hans A. Winther, Ryuichi Fujita, Richard O'Shaughnessy, S. Mirshekari, Emanuele Berti, Hirotada Okawa, Carlos A. R. Herdeiro, Tyson Littenberg, Ulrich Sperhake, Jutta Kunz, Tjonnie G. F. Li, Hector O. Silva, Saeed Kamali, James Healy, Ryan N. Lang, Paolo Pani, Daniela D. Doneva, Paulo C. C. Freire, Brett Bolen, Caixia Gao, Justin Alsing, Norbert Wex, Kostas D. Kokkotas, Michael Horbatsch, Sarah Caudill, Pedro G. Ferreira, Leo C. Stein, Vitor Cardoso, Laleh Sadeghian, Antoine Klein, Leonardo Gualtieri, Eugen Radu, Antonio De Felice, Kent Yagi, Miguel Zilhão, Davide Gerosa, Liang Chen, Marco O. P. Sampaio, Hajime Sotani, Chris Van Den Broeck, Mir Emad Aghili, Andrew Matas, Bangalore Suryanarayana Sathyaprakash, Luca Bombelli, Tessa Baker
Publikováno v:
NASA Astrophysics Data System
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Classical and Quantum Gravity
Classical and Quantum Gravity, 2015, 32, ⟨10.1088/0264-9381/32/24/243001⟩
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Classical and Quantum Gravity
Classical and Quantum Gravity, 2015, 32, ⟨10.1088/0264-9381/32/24/243001⟩
One century after its formulation, Einstein's general relativity has made remarkable predictions and turned out to be compatible with all experimental tests. Most of these tests probe the theory in the weak-field regime, and there are theoretical and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3847807476b58e0aca056d5b007cad5
http://hdl.handle.net/10281/325489
http://hdl.handle.net/10281/325489
Autor:
Péricles R. Barros, Flávio S. Coelho
Publikováno v:
IFAC Proceedings Volumes. 36:393-398
In this work the identification of first-order plus dead-time models from closed loop step response experiments is considered. Existing approaches for closed loop identification are examined and simple algorithm are proposed for dealling with the dea
Publikováno v:
Journal of High Energy Physics
In two previous papers we have computed the inelasticity $\epsilon$ in a head-on collision of two $D$-dimensional Aichelburg-Sexl shock waves, using perturbation theory to calculate the geometry in the future light-cone of the collision. The first or
Publikováno v:
Physical Review D. 90
n-DBI gravity explicitly breaks Lorentz invariance by the introduction of a unit time-like vector field, thereby giving rise to an extra (scalar) degree of freedom. We look for observational consequences of this mode in two setups. Firstly, we comput
Publikováno v:
Springer Proceedings in Mathematics & Statistics ISBN: 9783642401565
We present a model of gravity motivated by the Dirac–Born–Infeld type conformal scalar theory it yields when the Universe is conformally flat. We show that, if the Universe is permeated by a perfect fluid of radiation, the theory naturally predic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1b9c08a6429e0067a8f9d33a6846948
https://doi.org/10.1007/978-3-642-40157-2_21
https://doi.org/10.1007/978-3-642-40157-2_21
Publikováno v:
Springer Proceedings in Mathematics & Statistics ISBN: 9783642401565
We describe how to set up a perturbative framework to compute the metric in the future of a D-dimensional collision of two high speed black holes, by superimposing two equal Aichelburg–Sexl shock waves traveling, head-on, in opposite directions. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1b2e0e735ede2368c38019ea78445d2
https://doi.org/10.1007/978-3-642-40157-2_22
https://doi.org/10.1007/978-3-642-40157-2_22
Publikováno v:
Springer Proceedings in Mathematics & Statistics ISBN: 9783642401565
We describe the generalisation to higher orders, of a perturbative framework to find the metric after the collision of two Aichelburg–Sexl gravitational shock waves in D-dimensions. A central challenge is to estimate the amount of gravitational rad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bbe7c7e5b4e33f463527c6e91c3fcc1
https://doi.org/10.1007/978-3-642-40157-2_23
https://doi.org/10.1007/978-3-642-40157-2_23