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
15 papers · 2 filters
The variation of the electromagnetic coupling and quintessence
M. C. Bento, R. Gonzalez Felipe
The properties of quintessence are examined through the study of the variation of the electromagnetic coupling. We consider two simple quintessence models with a modified exponenti…
Stability window and mass-radius relation for magnetized strange quark stars
R. Gonzalez Felipe, A. Perez Martinez
The stability of magnetized strange quark matter (MSQM) is investigated within the phenomenological MIT bag model, taking into account the variation of the relevant input parameter…
Images IV: Strong evolution of the oxygen abundance in gaseous phases of intermediate mass galaxies since z=0.8
M. Rodrigues, F. Hammer, H. Flores +22
Intermediate mass galaxies (logM(Msun)>10) at z~0.6 are the likeliest progenitors of the present-day numerous population of spirals. There is growing evidence that they have evolve…
Near-IR Search for Lensed Supernovae Behind Galaxy Clusters - II. First Detection and Future Prospects
A. Goobar, K. Paech, V. Stanishev +11
Powerful gravitational telescopes in the form of massive galaxy clusters can be used to enhance the light collecting power over a limited field of view by about an order of magnitu…
Constraints on CDM cosmology from galaxy power spectrum, CMB and SNIa evolution
L. D. Ferramacho, A. Blanchard, Y. Zolnierowski
We examine the constraints that can be obtained on standard cold dark matter models from the most currently used data set: CMB anisotropies, type Ia supernovae and the SDSS luminou…
Observation of the suppression of the flux of cosmic rays above 4x10^19eV
The Pierre Auger Collaboration
The energy spectrum of cosmic rays above 2.5x10^18eV, derived from 20,000 events recorded at the Pierre Auger Observatory, is described. The spectral index gamma of the flux, J ~ E…
WMAP5 constraints on the unified model of dark energy and dark matter
T. Barreiro, O. Bertolami, P. Torres
We derive constraints on the parameter space of the unified model of dark energy and dark matter, the Generalized Chaplygin Gas (GCG), from the amplitudes and positions of the firs…
Second and third season QUaD CMB temperature and polarization power spectra
QUaD collaboration, C. Pryke, P. Ade +29
We report results from the second and third seasons of observation with the QUaD experiment. Angular power spectra of the Cosmic Microwave Background are derived for both temperatu…
Gravitational wave generation in power-law inflationary models
Paulo M. Sá, Alfredo B. Henriques
We investigate the generation of gravitational waves in power-law inflationary models. The energy spectrum of the gravitational waves is calculated using the method of continuous B…
Optimising large galaxy surveys for ISW detection
Marian Douspis, Patricia G. Castro, Chiara Caprini +1
We report on investigations of the power of next generation cosmic microwave background and large scale structure surveys in constraining the nature of dark energy through the cros…
The Ring Imaging Cherenkov detector of the AMS experiment: test beam results with a prototype
Luísa Arruda, Fernando Barão, Patrícia Goncalves +1
The Alpha Magnetic Spectrometer (AMS) to be installed on the International Space Station (ISS) will be equipped with a proximity Ring Imaging Cherenkov (RICH) detector for measurin…
Upper limit on the cosmic-ray photon flux above 10^19 eV using the surface detector of the Pierre Auger Observatory
The Pierre Auger Collaboration
A method is developed to search for air showers initiated by photons using data recorded by the surface detector of the Auger Observatory. The approach is based on observables sens…
The RICH detector of the AMS-02 experiment: status and physics prospects
Rui Pereira, M. Aguilar-Benitez, L. Arruda +37
The Alpha Magnetic Spectrometer (AMS), whose final version AMS-02 is to be installed on the International Space Station (ISS) for at least 3 years, is a detector designed to measur…
Binary Collisions and the Slingshot Effect
Amaro J. Rica da Silva, Jose P. S. Lemos
We derive the equations for the gravity assist manoeuvre in the general 2D case without the constraints of circular planetary orbits or widely different masses as assumed by Brouck…
Brane assisted quintessential inflation with transient acceleration
M. C. Bento, R. Gonzalez Felipe, N. M. C. Santos
A simple model of quintessential inflation with the modified exponential potential exp(-αϕ) [A + (ϕ-ϕ_0)^2] is analyzed in the braneworld context. Considering reheating via instant…