82 citations · 374 across the 20 of their papers we have counts for
20 papers
Cosmological Averaging in Nonminimally Coupled Gravity
S. R. Pinto, P. P. Avelino
We address the challenge, commonly referred to as the cosmological averaging problem, of relating the large-scale evolution of an inhomogeneous universe to that predicted by a homo…
Biased Domain Walls and the Origin of Early Massive Structures
Clara Winckler, Pedro P. Avelino, Lara Sousa
Discrete symmetry-breaking phase transitions in the early universe may have caused the formation of networks of sheet-like topological defects, usually referred to as domain walls,…
Deviations from the von Laue condition: Implications for the on-shell Lagrangian of particles and fluids
S. R. Pinto, P. P. Avelino
According to the von Laue condition, the volume integral of the proper pressure inside isolated particles with a fixed structure and finite mass vanishes in the Minkowski limit of…
On the seismic modelling of subgiant stars: testing different grid interpolation methods
Miguel Clara, Margarida S. Cunha, Pedro P. Avelino +3
Context. The emergence of mixed modes during the subgiant phase, whose frequencies are characterized by a fast evolution with age, can potentially enable a precise determination of…
Domain walls in light of Cosmic Microwave Background and Pulsar Timing Array data
D. Grüber, P. P. Avelino, L. Sousa
In this paper, we study the compatibility of biased domain wall scenarios with current gravitational wave data. We show that the Cosmic Microwave Background bounds on the fractiona…
Particles and their fluids in nontrivial matter extensions to general relativity
P. P. Avelino
According to the standard von Laue condition, the volume-averaged pressure inside particles of fixed mass and structure vanishes in the Minkowski limit of general relativity. Here…
Buoyancy glitches in pulsating stars revisited
Margarida S. Cunha, Yuri C. Damasceno, Juliana Amaral +3
Sharp structural variations induce specific signatures on stellar pulsations that can be studied to infer localised information on the stratification of the star. This information…
Sound speed as a source of the gravitational field in modified gravity
P. P. Avelino
In the context of gravity and other modified theories of gravity, the knowledge of the first order variation of the trace of the energy-momentum tensor with respect to…
Stochastic gravitational wave background generated by domain wall networks
D. Grüber, L. Sousa, P. P. Avelino
In this work we study the power spectrum of the Stochastic Gravitational Wave Background produced by standard and biased domain wall networks, using the Velocity-dependent One-Scal…
Can gravitational vacuum condensate stars be a dark energy source?
P. P. Avelino
Gravitational vacuum condensate stars, also known as gravastars, have been proposed as an alternative to black holes. Their interior contains a perfect fluid with an equation of st…
Evidence of structural discontinuities in the inner core of red-giant stars
Mathieu Vrard, Margarida S. Cunha, Diego Bossini +3
Red giants are stars in the late stages of stellar evolution. Because they have exhausted the supply of hydrogen in their core, they burn the hydrogen in the surrounding shell. Onc…
Full analytical approximation to the stochastic gravitational wave background generated by cosmic string networks
Lara Sousa, Pedro P. Avelino, Guilherme S. F. Guedes
We derive a full analytical approximation to the stochastic gravitational wave background generated by the loops that are produced throughout the cosmological evolution of cosmic s…
Signature of inflation in the stochastic gravitational wave background generated by cosmic string networks
G. S. F. Guedes, P. P. Avelino, L. Sousa
A cosmic string network created during an inflationary stage in the early Universe - here defined as i-string network - is expected to enter a transient stretching regime during in…
The influence of metallicity on stellar differential rotation and magnetic activity
Christoffer Karoff, Travis S. Metcalfe, Angela R. G. Santos +20
Observations of Sun-like stars over the last half-century have improved our understanding of how magnetic dynamos, like that responsible for the 11-year solar cycle, change with ro…
Revisiting the VOS model for monopoles
Lara Sousa, Pedro P. Avelino
We revisit the physical properties of global and local monopoles and discuss their implications in the dynamics of monopole networks. In particular, we review the Velocity-dependen…
Cosmic Microwave Background anisotropies generated by domain wall networks
L. Sousa, P. P. Avelino
We develop a numerical tool for the fast computation of the temperature and polarization power spectra generated by domain wall networks, by extending the publicly available CMBACT…
Could the dynamics of the Universe be influenced by what is going on inside black holes?
P. P. Avelino
We investigate the potential impact of mass inflation inside black holes on the dynamics of the Universe, considering a recent reformulation of general relativity, proposed in [1],…
The Stochastic Gravitational Wave Background Generated by Cosmic String Networks: the Small-Loop Regime
L. Sousa, P. P. Avelino
We consider an alternative approach for the computation of the stochastic gravitational wave background generated by small loops produced throughout the cosmological evolution of c…
Primordial black hole constraints on non-gaussian inflation models
P. P. Avelino
We determine the abundance of primordial black holes (PBHs) formed in the context of non-gaussian models with primordial density perturbations. We consider models with a renormaliz…
Entropy Perturbations due to Cosmic Strings
Pedro Avelino, Robert Caldwell
We examine variations in the equation of state of the cosmic string portion of the cosmological fluid which lead to perturbations of the background matter density. These fluctuatio…