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Política d’accés obert a la UB
Publicacions en accés obert derivades de l'activitat investigadora del professorat de la Universitat de Barcelona.
Fractal lattices are self-similar structures with repeated patterns on different scales. Quantum transport through such structures is subtle due to the possible co-existence of localized and extended states. Here, we study ...
A nondispersive quantum pendulum is presented. The proposed setup consists of an ultracold atomic cloud, featuring attractive interatomic interactions, loaded into a tilted ring potential. The classical and quantum domains ...
Over the last few years, many studies have found an empirical relationship between the abundance of a star and its age. Here we estimate spectroscopic stellar ages for 178 825 red-giant stars observed by the APOGEE survey ...
Mid-resolution InfRAreD Astronomical Spectrograph (MIRADAS) is a near-infrared multi-object spectrograph for Gran Telescopio Canarias (GTC). It has 12 deployable Integral Field Units (IFU) based on probe arms with pick-off ...
[eng] In this thesis we have presented a new method to search for tidal streams generated by globular clusters in the Gaia catalogue. This statistical method is based on the maximum likelihood technique to distinguish ...
Gaia Data Release 1 contains parallaxes for more than 700 Galactic Cepheids and RR Lyrae stars, computed as part of the Tycho-Gaia Astrometric Solution (TGAS). We have used TGAS parallaxes, along with literature (V, I, J, ...
Stellar flares are powerful bursts of electromagnetic radiation triggered by magnetic reconnection in the chromosphere of stars, occurring frequently and intensely on active M dwarfs. While missions like TESS and Kepler ...
Single photon sources are fundamental for applications in quantum computing, secure communication, and sensing, as they enable the generation of individual photons and ensure strict control over photon number statistics. ...
Context. Lunar occultations (LO) are a very efficient and powerful technique that achieves the best combination of high angular resolution and sensitivity possible today at near-infrared wavelengths. Given that the events ...
Massive stars are predominantly born in stellar associations or clusters [1]. The irradiation fields, stellar winds, and supernovae strongly impact their local environment. In the first few million years of a cluster’s ...
It has been long-understood that final state rescattering effects provide O(1) corrections to hadronic meson decays rates, such as η →πππ and η′→ηππ. Hence, one would expect that such effects would be just as important in ...
We investigate the ability of human ‘expert’ classifiers to identify strong gravitational lens candidates in Dark Energy Survey like imaging. We recruited a total of 55 people that completed more than 25 per cent of the ...
Pair-instability supernovae are theorized supernovae that have not yet been observationally confirmed. They are predicted to exist in low-metallicity environments. Because overall metallicity becomes lower at higher ...
The importance of alternative methods for measuring the Hubble constant, such as time-delay cosmography, is highlighted by the recent Hubble tension. It is paramount to thoroughly investigate and rule out systematic biases ...
We quantify the efects of light spin-zero particles with pseudoscalar couplings to leptons and scalar couplings to nucleons on the evolution of solar neutrinos. In this scenario the matter potential sourced by the nucleons ...
We study the superfluid dynamics of the outer core of neutron stars by means of a generalized hydrodynamic model made of a neutronic superfluid and a protonic superconductor, coupled by both the dynamic entrainment and the ...
Very recently, the Belle II collaboration presented a measurement for the decays + →¯ (*)0 +¯ 0 and 0 → (*)− +¯ 0, with the bulk of observed ( + 0 ) distributions showing low-mass structures in all ...
In recent years, a new generation of optical intensity interferometers has emerged, leveraging the existing infrastructure of Imaging Atmospheric Cherenkov Telescopes (IACTs). The MAGIC telescopes host the MAGIC-SII system ...
We determine the solar neutrino fuxes from the global analysis of the most up-to-date terrestrial and solar neutrino data including the fnal results of the three phases of Borexino. The analysis are performed in the framework ...
A study of resonant structures in Bþ → DþD−Kþ and Bþ → D−DþKþ decays is performed, using proton-proton collision data at center-of-mass energies of ffiffi s p ¼ 7, 8, and 13 TeV recorded by the LHCb experiment, corresponding ...
