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12 papers · 2 filters
The electromagnetic coupling and the dark side of the Universe
M. C. Bento, O. Bertolami, P. Torres
We examine the properties of dark energy and dark matter through the study of the variation of the electromagnetic coupling. For concreteness, we consider the unification model of…
Physical problems (microphysics) in relativistic plasma flows
L. O. Silva
Many problems in astrophysics involve relativistic outflows. The plasma dynamics in these scenarios is critical to determine the conditions for the self-consistent evolution of the…
Dark Energy, Dark Matter and Gravity
Orfeu Bertolami
We discuss the motivation for high accuracy relativistic gravitational experiments in the Solar System and complementary cosmological tests. We focus our attention on the issue of…
Multi-band Astronomy with LISA
G. Branduardi-Raymont, G. Ramsay, C. Wang +2
We discuss astrophysical scenarios relevant to the generation of gravitational waves (GW) and effects expected to arise from the interaction of GW and electromagnetic (EM) radiatio…
Baryon loading and the Weibel instability in gamma-ray bursts
M. Fiore, L. O. Silva, C. Ren +2
The dynamics of two counter-streaming electron-positron-ion unmagnetized plasma shells with zero net charge is analyzed in the context of magnetic field generation in GRB internal…
Braneworld inflation from an effective field theory after WMAP three-year data
M. C. Bento, R. Gonzalez Felipe, N. M. C. Santos
In light of the results from the WMAP three-year sky survey, we study an inflationary model based on a single-field polynomial potential, with up to quartic terms in the inflaton f…