Self-gravitating astronomical objects often show a central plateau in the density profile (core) whose physical origin is hotly debated. Cores are theoretically...
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PublicaciónNumerical simulations of dark matter haloes produce polytropic central cores when reaching thermodynamic equilibrium
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PublicaciónOn the orbital velocity of isolated galaxy pairs: a test of gravity in the low acceleration regime
The dynamics of isolated galaxy pairs represents an important tool to investigate the behaviour of gravity in the low acceleration regime. Statistical analysis...
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PublicaciónOn the orbital velocity of isolated galaxy pairs: II accurate MOND predictions
Examining a catalogue of isolated galaxy pairs, a preferred orbital intervelocity of ~ 150 km s -1 was recently reported. This discovery is difficult to...
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CharlaOrigin of space and time in a non-commutative cosmological model
A Friedman-like cosmological model, based on noncommutative geometry, is presented. Its Planck level is totally nonlocal with no space and no time. The dynamics...
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PublicaciónPlanck 2013 results. XXVI. Background geometry and topology of the Universe
The new cosmic microwave background (CMB) temperature maps from Planck provide the highest-quality full-sky view of the surface of last scattering available to...
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PublicaciónPlanck 2015 results. XIV. Dark energy and modified gravity
We study the implications of Planck data for models of dark energy (DE) and modified gravity (MG) beyond the standard cosmological constant scenario. We start...
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PublicaciónPlanck 2015 results. XVIII. Background geometry and topology of the Universe
Maps of cosmic microwave background (CMB) temperature and polarization from the 2015 release of Planck data provide the highestquality full-sky view of the...
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CharlaProbing the early Universe with gravitational Wave Background
We will review both theoretical and obsevational aspects of gravitational wave backgrounds of cosmological origin. We will present a classifcation of...
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PublicaciónTesting Newtonian gravity in the low acceleration regime with globular clusters: the case of ω Centauri revisited
Context. Stellar kinematics in the external regions of globular clusters can be used to probe the validity of Newton's law in the low acceleration regimes...