108 citations · 323 across the 12 of their papers we have counts for
12 papers
Stellar modeling within regularized 4D Einstein-Gauss-Bonnet gravity in light of current astrophysical constraints
G. Panotopoulos, Á. Rincón, I. Lopes
In this study we obtain interior solutions and investigate structural properties of isotropic compact stars in the framework of four-dimensional regularized Einstein-Gauss-Bonnet (…
Cosmological implications of Bumblebee theory on an FLRW background
Manuel Gonzalez-Espinoza, Grigorios Panotopoulos, Francisco Tello-Ortiz
We investigate some cosmological implications at background level of the Bumblebee model. The phase-space, the critical points and their stability are analyzed in detail applying w…
Compact Stars in Symmetric Teleparallel Scalar-Tensor Gravity
Grigorios Panotopoulos, Andrés Lueiza-Colipí, Nikolaos Dimakis +1
We investigate the existence of static, spherically symmetric compact objects within the framework of symmetric teleparallel scalar-tensor gravity. This theory extends the Brans-Di…
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…
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…
GW170817 constraints on the properties of a neutron star in the presence of WIMP dark matter
Abdul Quddus, Grigorios Panotopoulos, Bharat Kumar +2
The properties of a neutron star are studied in the presence of dark matter. We have considered a relatively light Weakly Interacting Massive Particle (WIMP) as a dark matter candi…
Scale-dependent (2+1) - dimensional electrically charged black holes in Einstein-power-Maxwell theory
Angel Rincon, Ernesto Contreras, Pedro Bargueño +2
In this work we extend and generalize our previous work on the scale dependence at the level of the effective action of black holes in the presence of non-linear electrodynamics. I…
Observational constraints on warm quasi-exponential inflation
Nelson Videla, Grigoris Panotopoulos
In the present work we study a warm inflationary model defined by a quasi-exponential inflaton potential and an inflaton decay rate proportional to the Hubble rate. The model is ch…
Scale dependent three-dimensional charged black holes in linear and non-linear electrodynamics
Angel Rincon, Ernesto Contreras, Pedro Bargueño +3
In the present work we study the scale dependence at the level of the effective action of charged black holes in Einstein-Maxwell as well as in Einstein-power-Maxwell theories in (…
Natural Inflation on the brane with a TeV-scale gravity: Parameter constraints after Planck 2015
Nelson Videla, Grigorios Panotopoulos
In the present work we have studied Natural Inflation in the framework of the Randall-Sundrum II brane model (RS-II) in the light of the latest Planck results. Adopting the Randall…
Warm inflationary universe model in light of Planck 2015 results
Grigorios Panotopoulos, Nelson Videla
In the present work we show that warm chaotic inflation characterized by a simple self-interaction potential for the inflaton, excluded by current data in standard…
Brane-bulk energy exchange : a model with the present universe as a global attractor
G. Kofinas, G. Panotopoulos, T. N. Tomaras
The role of brane-bulk energy exchange and of an induced gravity term on a single braneworld of negative tension and vanishing effective cosmological constant is studied. It is sho…