18.1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of LisbonPT1.3k papers
- Universidade Técnica de LisboaPT388 papers
- Centre National de la Recherche ScientifiqueFR326 papers
- Instituto de Plasmas e Fusão NuclearPT209 papers
- European Organization for Nuclear ResearchCH202 papers
- Centro de Física Teórica de Partículas201 papers
- Instituto Politécnico de LisboaPT190 papers
- Instituto de TelecomunicaçõesPT175 papers
- Universitat de ValènciaES175 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR143 papers
- Centro de Astrofísica e GravitaçãoPT133 papers
- LIP - Laboratory of Instrumentation and Experimental Particle PhysicsPT133 papers
31 papers · 2 filters
Kinematic restrictions on particle collisions near extremal black holes: A unified picture
Filip Hejda, Jiří Bičák
In 2009, Banados, Silk and West (BSW) pointed out the possibility of having an unbounded limit of centre-of-mass collision energy for test particles in the field of an extremal Ker…
Black holes in Einstein-Gauß-Bonnet-dilaton theory
Jose Luis Blázquez-Salcedo, Vitor Cardoso, Valeria Ferrari +9
Generalizations of the Schwarzschild and Kerr black holes are discussed in an astrophysically viable generalized theory of gravity, which includes higher curvature corrections in t…
Perturbed black holes in Einstein-dilaton-Gauss-Bonnet gravity: Stability, ringdown, and gravitational-wave emission
Jose Luis Blázquez-Salcedo, Caio F. B. Macedo, Vitor Cardoso +5
Gravitational waves emitted by distorted black holes---such as those arising from the coalescence of two neutron stars or black holes---carry not only information about the corresp…
Complete conservative dynamics for inspiralling compact binaries with spins at the fourth post-Newtonian order
Michèle Levi, Jan Steinhoff
In this work we complete the spin-dependent conservative dynamics of inspiralling compact binaries at the fourth post-Newtonian order, and in particular the derivation of the next-…
Bounded energy waves on the black hole interior of Reissner-Nordström-de Sitter
João L. Costa, Anne T. Franzen
Motivated by the Strong Cosmic Censorship Conjecture, in the presence of a cosmological constant, we consider solutions of the scalar wave equation on fixed subextremal…
Astrophysical applications of the post-Tolman-Oppenheimer-Volkoff formalism
Kostas Glampedakis, George Pappas, Hector O. Silva +1
The bulk properties of spherically symmetric stars in general relativity can be obtained by integrating the Tolman-Oppenheimer-Volkoff (TOV) equations. In previous work we develope…
Natural Inflation on the brane with a TeV-scale gravity: Parameter constraints after Planck 2015
Nelson Videla, Grigorios Panotopoulos
In the present work we have studied Natural Inflation in the framework of the Randall-Sundrum II brane model (RS-II) in the light of the latest Planck results. Adopting the Randall…
Analytic gravitational waveforms for generic precessing compact binaries
Katerina Chatziioannou, Antoine Klein, Neil Cornish +1
Binary systems of two compact objects circularize and spiral toward each other via the emission of gravitational waves. The coupling of the spins of each object with the orbital an…
Shadows of Kerr black holes with and without scalar hair
Pedro V. P. Cunha, Carlos A. R. Herdeiro, Eugen Radu +1
For an observer, the Black Hole (BH) shadow is the BH's apparent image in the sky due to the gravitational lensing of nearby radiation, emitted by an external source. A recent clas…
Spectroscopy of Kerr black holes with Earth- and space-based interferometers
Emanuele Berti, Alberto Sesana, Enrico Barausse +2
We estimate the potential of present and future interferometric gravitational-wave detectors to test the Kerr nature of black holes through "gravitational spectroscopy," i.e. the m…
eLISA eccentricity measurements as tracers of binary black hole formation
Atsushi Nishizawa, Emanuele Berti, Antoine Klein +1
Up to hundreds of black hole binaries individually resolvable by eLISA will coalesce in the Advanced LIGO/Virgo band within ten years, allowing for multi-band gravitational wave ob…
Scalar waves in regular Bardeen black holes: Scattering, absorption and quasinormal modes
Caio F. B. Macedo, Luís C. B. Crispino, Ednilton S. de Oliveira
We discuss the phenomenology of massless scalar fields around a regular Bardeen black hole, namely absorption cross section, scattering cross section and quasinormal modes. We comp…
Magnetic black holes and monopoles in a nonminimal Einstein-Yang-Mills theory with a cosmological constant: Exact solutions
Alexander B. Balakin, José P. S. Lemos, Alexei E. Zayats
Alternative theories of gravity and their solutions are of considerable importance since at some fundamental level the world can reveal new features. Indeed, it is suspected that t…
Vacuum polarization in asymptotically Lifshitz black holes
Gonçalo M. Quinta, Antonino Flachi, José P. S. Lemos
There has been considerable interest in applying the gauge/gravity duality to condensed matter theories with particular attention being devoted to gravity duals (Lifshitz spacetime…
Relativistic stars in scalar-tensor theories with disformal coupling
Masato Minamitsuji, Hector O. Silva
We present a general formulation to analyze the structure of slowly rotating relativistic stars in a broad class of scalar-tensor theories with disformal coupling to matter. Our ap…
Numerical Relativity and High Energy Physics: Recent Developments
Emanuele Berti, Vitor Cardoso, Luis C. B. Crispino +3
We review recent progress in the application of numerical relativity techniques to astrophysics and high-energy physics. We focus on some developments that took place within the "N…
Quasinormal modes of relativistic stars and interacting fields
Caio F. B. Macedo, Vitor Cardoso, Luís C. B. Crispino +1
The quasinormal modes of relativistic compact objects encode important information about the gravitational response associated with astrophysical phenomena. Detecting such oscillat…
Viewpoint: The First Sounds of Merging Black Holes
Emanuele Berti
Gravitational waves emitted by the merger of two black holes have been detected, setting the course for a new era of observational astrophysics.
Regular black holes: Guilfoyle's electrically charged solutions with a perfect fluid phantom core
José P. S. Lemos, Vilson T. Zanchin
Regular black hole solutions are found among the Guilfoyle exact solutions. These are spherically symmetric solutions of general relativity coupled to Maxwell's electromagnetism an…
Neutron stars in Horndeski gravity
Andrea Maselli, Hector O. Silva, Masato Minamitsuji +1
Horndeski's theory of gravity is the most general scalar-tensor theory with a single scalar whose equations of motion contain at most second-order derivatives. A subsector of Hornd…
Gravitomagnetism and the significance of the curvature scalar invariants
L. Filipe O. Costa, Lode Wylleman, José Natário
The curvature invariants have been subject of interest due to the debate concerning the notions of intrinsic/extrinsic frame-dragging, the use of the electromagnetic analogy in suc…
Is the gravitational-wave ringdown a probe of the event horizon?
Vitor Cardoso, Edgardo Franzin, Paolo Pani
It is commonly believed that the ringdown signal from a binary coalescence provides a conclusive proof for the formation of an event horizon after the merger. This expectation is b…
Compact objects in Horndeski gravity
Hector O. Silva, Andrea Maselli, Masato Minamitsuji +1
Horndeski gravity holds a special position as the most general extension of Einstein's theory of general relativity with a single scalar degree of freedom and second-order field eq…
A stellar model with diffusion in general relativity
Artur Alho, Simone Calogero
We consider a spherically symmetric stellar model in general relativity whose interior consists of a pressureless fluid undergoing microscopic velocity diffusion in a cosmological…