CAPA Centro de Investigacion en Fisica de Astroparticulas y Altas Energias
Research center on astrophysics, particle physics and cosmology
Georg G. Raffelt, Max-Planck-Institut für Physik. His research is in the areas of theoretical astroparticle physics and cosmology. In particular, it revolves around weakly interacting particles (neutrinos, the hypothetical axion, or weakly interacting dark matter candidates), their role in astrophysics and cosmology.
Miguel Á. Pérez Torres, research scientist at the Instituto de Astrofísica de Andalucía (IAA-CSIC, Granada, Spain) and collaborator of the DFTUZ
Abstract The Square Kilometre Array (SKA) project is an international effort to build the world’s largest radio telescope. The SKA is expected to conduct transformational science to improve our understanding of the Universe and the laws of fundamental physics, monitoring the sky in unprecedented detail and mapping it many times faster than any current facility.
The SKA will not be a single telescope, but a collection of telescopes spread over long distances in the Southern Hemisphere. In this talk, I will give an overview of the SKA project and its science goals, which range from the cradle of life in exoplanets up to shedding light on the Epoch of Reionization and the Dark Ages of the Universe.
El curso extraordinario de la Universidad de Zaragoza se ha desarrollado del 18 al 20 de julio de 2022.
Organizadores: Theopisti Dafni y Eduardo Follana.
El reto con el que se encuentra actualmente la física fundamental, tras el descubrimiento del Higgs, que completa el modelo estándar, es la física más allá de dicho modelo, necesaria para entender y describir la
energía oscura, la materia oscura, y las oscilaciones de neutrinos. Cada vez más la sociedad se interesa por los avances en la física fundamental y la tecnología que apoya sus experimentos. El objetivo del curso es dar una pequeña introducción de temas relacionados con la Física del Universo, proporcionando los conceptos básicos y el estado actual de nuestros conocimientos. Parte de los objetivos consisten en difundir los conceptos fundamentales, para que éstos puedan incorporarse a programas docentes de diferentes niveles educativos preuniversitarios.
Cherenkov telescopes are instruments optimized for detection of very high energy (VHE, E > 100 GeV) gamma rays from astrophysics sources. They play a crucial role in testing possible consequences of Quantum Gravity (QG), such as violation or deformation of Lorentz symmetry. In both cases, the photon dispersion relation is modified, making the photon group velocity energy dependent, and possibly modifying kinematics and dynamics of electromagnetic interactions. These tiny effects are vastly below the sensitivity of present-day laboratories. However, if real, they could be measured using VHE gamma rays of astrophysical origin. Cosmological distances that they cross serve as a natural amplifier for the QG effects. While no deviations from the special relativistic predictions have been detected, strong constraints have been set on modified photon dispersion relations.
In this session we will explain the process of testing implications of modified photon dispersion relations on VHE gamma rays using Cherenkov telescopes. We will cover different stages from observations, Cherenkov telescopes’ data analysis, statistical methods employed, and finally setting constraints on the QG energy scale.
Jueves 12 mayo, 12 horas, seminario de Física Nuclear, on-line (Google Meet)
Diego Blas is a researcher at UAB (Universidad Autónoma de Barcelona) and IFAE (Instituto de Física de Altas Energías). His research interests are in theoretical physics, gravitation and cosmology.
Abstract: In this talk, current and future efforts to detect gravitational waves from Earth and space observatories will be reviewed. Diego will also emphasise the physical consequences of these searchers, in particular regarding fundamental physics (primordial cosmology, dark matter, modified gravity…)
Viernes 6 mayo, 12 horas, seminario de Física Nuclear. On-line (Google-meet)
Charla de Diego Blas (cartel)
La Unidad CIEMAT – Física de Partículas convoca la segunda edición de phy6cool, escuela de verano de Física de Partículas, Astropartículas y Cosmología. La escuela se celebrará en formato mixto online del 13 al 15 de julio de 2022 y presencial en el CIEMAT (Madrid) del 18 al 22 de julio; está dirigida a estudiantes hispanohablantes cursando el grado de Físicas. La escuela estará compuesta de seminarios, prácticas de laboratorio, ejercicios prácticos y trabajos tutelados. El objetivo de phy6cool es proporcionar una visión general del campo de la física fundamental y una orientación sobre las diversas opciones existentes de desarrollo profesional.
El plazo de inscripción permanecerá abierto hasta 30 de abril.
Toda la información referente a la escuela se encuentra en el siguiente enlace: http://phy6cool.ciemat.es/
Université Mohammed V de Rabat
2 grants are made available for a period of internship at the European university “Universidad de Zaragoza – UNIZAR”. This is based on the grant agreement signed between the mentioned university and SEPIE, and in accordance with the inter-institutional agreement signed between the University of Zaragoza – UNIZAR – and Mohammed V University in Rabat, within the framework of the ERASMUS+ Programme with partner countries.
Dr. Carlos López Sanjuan is a researcher at CEFCA (Centro de Estudios de Física del Cosmos de Aragón).
Abstract: White dwarfs are the degenerate compact remnants of stars with masses below 8 Msun. They do not have an internal source of energy and just cool down with time. In addition, they show a diversity of atmospheric compositions in their spectra, with sources presenting hydrogen (H) lines (DA type), helium (He) lines (DO and DB type), metal lines (DZ type), and featureless spectra (DC type) among others. In this seminar we present our recent work about the spectral evolution of white dwarfs with effective temperature (i.e., their age) using the Javalambre Photometric Local Universe Survey (J-PLUS). We analysed 5926 white dwarfs with r <= 19.5 mag in common between the white dwarf catalogue presented in Gentile Fusillo et al. 2021, defined from Gaia EDR3, and J-PLUS DR2. We estimated their effective temperature (Teff), surface gravity, parallax, and spectral type; and the probability of having a H-dominated atmosphere (p_H) for each source. Our analysis yields a 21 +- 3% increase in the fraction of He-dominated white dwarfs from Teff = 20000 K to Teff = 5000 K.
Horario: 12:00, del jueves 10 de marzo, en el seminario de Física Nuclear. On-line
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