The standard cosmological paradigm narrates a reassuring story of a universe currently dominated by an enigmatic dark energy component. Disquietingly, its...
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PublicationA common explanation of the Hubble tension and anomalous cold spots in the CMB
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TalkCan Voids and Superclusters trace Dark Energy?
I revisit the claim of Dark Energy detection after stacking CMB data on the angular position of voids and superclusters in Sloan Data. I examine the...
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TalkCosmic Microwave Background observations
In the first part of this talk I will present a historical review of the CMB observations, one of the most powerful cosmological probes. Following the first...
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PublicationCosmological implications of baryon acoustic oscillation measurements
We derive constraints on cosmological parameters and tests of dark energy models from the combination of baryon acoustic oscillation (BAO) measurements with...
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PublicationCosmology with galaxy-galaxy lensing on non-perturbative scales: emulation method and application to BOSS LOWZ
We describe our non-linear emulation (i.e. interpolation) framework that combines the halo occupation distribution (HOD) galaxy bias model with N-body...
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TalkDark Energy and Cosmic Sound
I will discuss how the acoustic oscillations that propagate in the photon-baryon fluid during the first million years of the Universe provide a robust method...
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NewsDESI opens its 5.000 eyes to capture the colors of the Cosmos
The new instrument, the result of an international collaboration of almost a hundred institutions, including the Instituto de Astrofísica de Canarias, has made...
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PublicationElectromagnetic Dark Energy
We introduce a new model for dark energy in the Universe in which a small cosmological constant is generated by ordinary electromagnetic vacuum energy. The...
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PublicationEuclid preparation. XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography
The analysis of weak gravitational lensing in wide-field imaging surveys is considered to be a major cosmological probe of dark energy. Our capacity to...