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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TalkFrom Cosmology to Galaxies and Back Again
The evidence for the existence of dark energy is conclusive, but its nature remains one of the most puzzling mysteries in all of physics. Astronomical surveys...