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9 papers · 2 filters
Small-scale anisotropy and intermittency in high and low-latitude solar wind
A. Bigazzi, L. Biferale, S. M. A. Gama +1
We analyze low and high--latitude fast solar wind data from the Ulysses spacecraft from 1992 to 1994 using a a systematic method to analyse the anisotropic content of the magnetic…
Site Evaluation and RFI spectrum measurements in Portugal at the frequency range 0.408-10 GHz for a GEM polarized galactic radio emission experiment
R. Fonseca, D. Barbosa, L. Cupido +3
We probed for Radio Frequency Interference (RFI) for the three potential Galactic Emission Mapping Experiment (GEM) sites at Portugal using custom made omnidirectional disconic ant…
The coincidence problem in linear dark energy models
P. P. Avelino
We show that a solution to the the coincidence problem can be found in the context of a generic class of dark energy models with a scalar field, , with a linear effective potent…
Scaling defect decay and the reionization history of the Universe
P. P. Avelino, D. Barbosa
We consider a model for the reionization history of the Universe in which a significant fraction of the observed optical depth is a result of direct reionization by the decay produ…
Cosmic strings in Bekenstein-type models
J. Menezes, P. P. Avelino, C. Santos
We study static cosmic string solutions in the context of Bekenstein-type models. We show that there is a class of models of this type for which the classical Nielsen-Olesen vortex…
The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
C. A. Tremonti, T. M. Heckman, G. Kauffmann +9
We utilize Sloan Digital Sky Survey imaging and spectroscopy of ~53,000 star-forming galaxies at z~0.1 to study the relation between stellar mass and gas-phase metallicity. We deri…