Descripción del proyecto
Nuevos modelos informáticos podrían arrojar luz sobre las explosiones solares en la cromosfera
Se sabe que el Sol tiene actividad magnética, que incluye fulguraciones periódicas que emergen de su superficie cuando las líneas del campo magnético se entrelazan, se cruzan o se reorganizan cerca de manchas solares. Las fulguraciones envían corrientes de partículas cargadas al espacio. Si se dirigen a la Tierra, estas partículas pueden desestabilizar satélites o provocar coloridas auroras. El proyecto CHLARE, financiado con fondos europeos, tiene por objeto mejorar la comprensión de las fulguraciones solares y los eventos solares relacionados en la cromosfera, sobre la que se ha estudiado muy poco. El proyecto actualizará el código de inversión existente para interpretar la física de las fulguraciones en la región espectral del triplete del He I a 1083,0 nm y difundirlo de forma gratuita. El trabajo se complementará con simulaciones hidrodinámicas y los resultados del proyecto serán una base valiosa para el análisis de las fulguraciones solares y la meteorología espacial.
Objetivo
This research project aims to study the variations of the solar magnetic field in flares, the most energetic events in our solar system. Flares accelerate charged particles into space, which may adversely affect satellites and Earth’s technology. Despite their clear importance for today’s technology, the timing and positioning when flares occur are so far unpredictable. Changes in the solar magnetic field topology are known to be the causes for flares, but their physics is not understood in detail. Past studies have shown prominent changes of the magnetic field in the photosphere during flares. But higher in the atmosphere, in the chromosphere, studies are scarce because ground-based telescopes with special instrumentation and capabilities are needed. No space mission has been or is being planned with capabilities for those chromospheric magnetic measurements. The most suitable spectral range to study the upper chromosphere is the He I 1083.0 nm triplet and the project has access to two unique data sets of high-energetic flares in this spectral region. Since there are no diagnostic tools for this prominent spectral triplet in flares, the first goal is to upgrade an existing tool (spectral-line inversion code) to include flare physics. The code will be made freely available for the benefit of the scientific community, so that it can be used to analyze future flare observations in this wavelength range. The second aim is to use the upgraded tool to infer for the first time the evolution of the magnetic field vector in the two abovementioned data sets. The results will provide thresholds for the shear/ twist of the field lines that lead to the analyzed flares. Hydrodynamic simulations and satellite data will complement the results to simulate the atmospheric response to the flare and compute the energy budget of the magnetic changes compared to other flare processes. The results will have a deep impact on flare models, future predictors, and space weather.
Ámbito científico
Programa(s)
Régimen de financiación
MSCA-IF-EF-ST - Standard EFCoordinador
38205 San Cristobal De La Laguna
España