1k citations · 2.5k across the 16 of their papers we have counts for
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Dark matter from cosmic defects on galactic scales?
N. Guerreiro, P. P. Avelino, J. P. M. de Carvalho +1
We discuss the possible dynamical role of extended cosmic defects on galactic scales, specifically focusing on the possibility that they may provide the dark matter suggested by th…
Topological Defects in Contracting Universes
P. P. Avelino, C. J. A. P. Martins, C. Santos +1
We study the behaviour and consequences of cosmic string networks in contracting universes. They approximately behave during the collapse phase as a radiation fluids. Scaling solut…
Cosmic Numbers: A Physical Classification for Cosmological Models
P. P. Avelino, C. J. A. P. Martins
We introduce the notion of the cosmic numbers of a cosmological model, and discuss how they can be used to naturally classify models according to their ability to solve some of the…
Alternatives to Quintessence Model Building
P. P. Avelino, L. M. G. Beca, J. P. M. de Carvalho +2
We discuss the issue of toy model building for the dark energy component of the universe. Specifically, we consider two generic toy models recently proposed as alternatives to quin…
Topological defects: A problem for cyclic universes?
P. P. Avelino, C. J. A. P. Martins, C. Santos +1
We study the behaviour of cosmic string networks in contracting universes, and discuss some of their possible consequences. We note that there is a fundamental time asymmetry betwe…
Modified Median Statistics and Type Ia Supernova Data
P. P. Avelino, C. J. A. P. Martins, P. Pinto
The median statistic has recently been discussed by Gott \textit{et al.} as a more reliable alternative to the standard likelihood analysis, in the sense of requiring fewer a…
Can our Universe be inhomogeneous on large sub-horizon scales ?
P. P. Avelino, J. P. M. de Carvalho, C. J. A. P. Martins +1
We show that our Universe may be inhomogeneous on large sub-horizon scales without us being able to realise it. We assume that a network of domain walls permeates the universe divi…
Topological defects: fossils of an anisotropic era?
P. P. Avelino, C. J. A. P. Martins
We consider the evolution of domain walls produced during an anisotropic phase in the very early universe, showing that the resulting network can be very anisotropic. If the domain…
Galactic Magnetic Fields from Superconducting Strings
C. J. A. P. Martins, E. P. S. Shellard
We use a simple analytic model for the evolution of currents in superconducting strings to estimate the strength of the `seed' magnetic fields generated by these strings. This mode…