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04/10/2024, 09:25
Time for informal talks and getting your accreditations! Also, put up your poster!
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04/10/2024, 09:45
Welcome talks from the SOC and institute directors.
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Pau Grèbol-Tomàs (Institut de Ciències de l'Espai (ICE-CSIC))04/10/2024, 10:00
Introduction: Nanoindentation is a powerful quasi-nondestructive technique in which the sample is indented with a nanometer-sized sharp end. The amount of displacement as a function of the applied load is parametrized to extract its local mechanical properties. This technique is widely used in material science as it is arising as a promising tool for extraterrestrial material...
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Adriana Nadal Matosas (ICCUB)04/10/2024, 10:10
The Baryon Acoustic Oscillation (BAO) feature is one of the main probes of cosmology today. It makes it possible to infer the expansion history of the universe through galaxy clustering. Throughout the standard analysis pipeline for measuring the BAO, reference cosmological models are assumed to enhance and model the signal. Current surveys such as DESI claim a precision of 0.52% on the BAO...
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Jordi Blanco Pozo (Institut de Ciències de l'Espai (ICE-CSIC))04/10/2024, 10:20
Exoplanet studies have shown us that most stars host in average planetary systems. Very few of these exoplanets have been directly observed. We rely mostly on indirect methods such as the radial velocity (RV) technique. This technique relies on detecting exoplanets by analyzing the Doppler signals induced on the stellar spectra due to an orbiting planet. However, RVs are not only sensitive to...
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Balma Duch Maria (IFAE)04/10/2024, 10:30
The anomalous magnetic moment of the muon, $a_{\mu} = (g-2)_{\mu}/2 $, remains a significant discrepancy between theoretical predictions and experimental observations, indicating possible physics beyond the Standard Model. We explore the nonlinear Born-Infeld Lagrangian, characterized by a quartic photon self-interaction, to reconcile these differences. By calculating contributions from...
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Simranpreet Kaur (Institute of Space Sciences (ICE-CSIC), Barcelona)04/10/2024, 10:40
Scallop-shell stars are a recently-discovered class of young M dwarfs showing complex optical light curves, characterized by
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periodic dips and additional features stable over tens to hundreds of rotation cycles, whose origin is not understood. 2MASS
J05082729−2101444 is a ∼25 Myr-old scallop-shell star identified using TESS data, with photometric period of 6.73 h attributed
to rotation.... -
Sandra Tomàs Valls (ICCUB)04/10/2024, 10:50
Quarkonium, a bound state of a quark and antiquark, offers valuable insights into the strong interaction. Recent discoveries of exotic hadrons, such as hybrids, provide new opportunities to explore QCD beyond conventional quark models. This work explains quarks and hadrons while examinings very lightly the spectrum and decays of quarkonium-like exotic states.
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Jordi Rafecas04/10/2024, 11:00
Classical GR in five dimensions is richer than our usual four dimensional universe in terms of geometries with horizons and singularities, i.e. "black stuff". Here we aim to study two of those geometries and try to establish how they both converge to a common "critical geometry" in a specific extremal regime, bringing a picture equivalent to a phase diagram of black geometries in five...
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Òscar Porqueras León (IEEC/ICE-CSIC)04/10/2024, 11:10
With the James Webb Space Telescope (JWST) ushering in a new era of exoplanet observations, accurately characterising exoplanet atmospheres is more crucial than ever for understanding their chemical compositions and potential habitability. A key observational technique for this is transmission spectroscopy, which measures the wavelength-dependent decrease in starlight as an exoplanet transits...
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Emanuele Fondi (ICCUB)04/10/2024, 11:20
In the standard scenario, single-field slow-roll inflation provides a mechanism to seed primordial density perturbations, distributed as a Gaussian, which evolve during the expansion history of the Universe to eventually form its observable structure. Alternative inflationary models, however, can produce amounts of primordial non-Gaussianity (PNG) which detection would rule out the standard...
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Marina Orta Terré (ICC)04/10/2024, 12:30
LISA will be the first space-based gravitational wave observatory to scan the entire sky, offering novel insights into low-frequency gravitational waves (0.1 mHz - 1 Hz). It consists of three interferometer arms, each with its own free-falling test masses (TMs). High-energy particles from the radiation environment interacting with the LISA spacecrafts can induce a net charging rate in the TMs,...
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Pau Solé Vilaró04/10/2024, 12:40
Holography is a field of theoretical physics that explores the nature of quantum gravity. Through the AdS/CFT duality, physicists can solve complicated computations of gauge theories inhabiting a "boundary" by working with gravity theories in one more dimension, the so-called bulk. The duality dictates an equivalence between objects on each of its two sides, like a dictionary. What happens if...
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Claudia Soriano Guerrero (Institut de Ciències de l'Espai)04/10/2024, 12:50
INTRODUCTION
Hot Jupiters (HJs) are gas giants orbiting very close to their host stars, with orbital periods of a few days, corresponding to distances within about 0.1 AU. Due to the high irradiation from their host stars and the tidal locking of the rotational and orbital periods, strong temperature differences persist between the dayside and the nightside. This triggers strong thermal...
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Héctor Cancio Andel (IFAE)04/10/2024, 13:00
Through a holographic model of QCD, we present a phenomenological approach to study the running of the strong coupling constant αs in both non-perturbative and perturbative regimes. The renormalization of the metric tensor, driven by the Ricci Flow, and the breaking of conformal and chiral symmetries -- thanks to introducing a double dilaton model and large-Nc corrections -- allow us to relate...
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Daniel Íñiguez-Pascual04/10/2024, 13:10
In this talk I will present the current status of our development of an effective radiative model versatile enough to be applied to hundreds of pulsars. The model follows the dynamics of charged particles being accelerated in the magnetosphere of a pulsar and computes their emission via synchro-curvature radiation, with only three free effective parameters involved. The model has succeeded in...
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Kim Phan (ICE-CSIC)04/10/2024, 13:20
Type Ia supernovae (SNe Ia) are thermonuclear explosions resulting from white dwarfs that have exceeded the Chandrasekhar limit of 1.44 solar masses.
In near-infrared (NIR) wavelengths, these SNe are nearly standard candles even before correcting for light-curve shape and reddening, and can with high precision be used as distance estimators to their host galaxies.
In this talk, I will...
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Lucy Reynolds
I’m developing a method to measure galaxy shapes, which are used for weak lensing shear cosmology, using deep learning techniques. I use a convolutional neural network (CNN) to measure galaxy ellipticities from input images of simulated galaxies. The method includes PSF correction and calibration of the weak lensing shear using a method called Metacalibration.
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