124 citations · 1.6k across the 72 of their papers we have counts for
8 papers · 1 filter
Lagrangian formulation for an extended cosmological equation-of-state
Grigoris Panotopoulos, Ilidio Lopes, Angel Rincon
We show that the extended cosmological equation-of-state developed starting from a Chaplygin equation-of-state, recently applied to stellar modeling, is a viable dark energy model…
Radial oscillations and tidal Love numbers of dark energy stars
Grigoris Panotopoulos, Angel Rincon, Ilidio Lopes
We investigate the properties of relativistic stars made of dark energy. We model stellar structure assuming i) isotropic perfect fluid and ii) a dark energy inspired equation of s…
QCD color superconductivity in compact stars: color-flavor locked quark star candidate for the gravitational-wave signal GW190814
Zacharias Roupas, Grigoris Panotopoulos, Ilidio Lopes
At sufficiently high densities and low temperatures matter is expected to behave as a degenerate Fermi gas of quarks forming Cooper pairs, namely a color superconductor, as was ori…
Towards a more rigorous treatment of uncertainties on the velocity distribution of dark matter particles for capture in stars
José Lopes, Thomas Lacroix, Ilídio Lopes
Dark matter (DM) capture in stars offers a rich phenomenology that makes it possible to probe a wide variety of particle DM scenarios in diverse astrophysical environments. In spit…
Quark stars with isotropic matter in Hořava gravity and Einstein-æther theory
Grigoris Panotopoulos, Daniele Vernieri, Ilídio Lopes
We study non-rotating and isotropic strange quark stars in Lorentz-violating theories of gravity, and in particular in Hořava gravity and Einstein-æther theory. For quark matter we…
Constraints on light dark matter particles using white dwarf stars
Grigoris Panotopoulos, Ilídio Lopes
We report constraints on the nucleon-dark matter particle cross section using the internal luminosity of observed white dwarf stars in the globular cluster Messier 4. Our results c…