Objectif On Earth, nuclear explosions take place in controlled environments or use small amounts of fuel. Despite that, they generate spectacular amounts of energy. When nuclear reactions ignite on a neutron star, the whole surface can burn, resulting in extremely bright X-ray flashes that outshine all the other emission. These flashes are known as type I bursts. Their emission encodes information about the neutron star mass and radius and this makes them ideal probes to explore such stars' properties.Much effort has been invested to describe nuclear explosions, both on Earth and in space, but the modelling of the type I bursts entails extra difficulties. In particular, simulating deflagrating flames in the extreme conditions of neutron stars has proven particularly challenging. Nonetheless, in the last several years I have been able to produce the first ab initio 2D simulations of type I bursts where the deflagration takes place inside a burning hurricane that expands to engulf the whole surface of the star. However, 2D simulations have inherent limitations.With this project I intend to model the nuclear explosions during the bursts combining detailed microphysics with a magnetohydrodynamical description set for the first time in a 3D spherical geometry to be able to capture the combination of all the relevant effects. Understanding all the different facets of the bursts and their physical ingredients, I will produce unprecedented simulations which I will couple to a ray tracing code that takes into account the general relativistic effects of the star's gravity and rotation on the emitted photons. I will be able to produce extremely accurate synthetic lightcurves to confront with the observations in order to extract the information about the neutron star contained in the X-ray emission. Once the parameters of the bursters are known, these can be used to constrain the yet unknown behavior of matter in the core of neutron stars. Champ scientifique natural sciencesphysical sciencesastronomystellar astronomyneutron stars Programme(s) H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility Thème(s) MSCA-IF-2015-GF - Marie Skłodowska-Curie Individual Fellowships (IF-GF) Appel à propositions H2020-MSCA-IF-2015 Voir d’autres projets de cet appel Régime de financement MSCA-IF-GF - Global Fellowships Coordinateur UNIVERSITY OF SOUTHAMPTON Contribution nette de l'UE € 251 857,80 Adresse Highfield SO17 1BJ Southampton Royaume-Uni Voir sur la carte Région South East (England) Hampshire and Isle of Wight Southampton Type d’activité Higher or Secondary Education Establishments Liens Contacter l’organisation Opens in new window Site web Opens in new window Participation aux programmes de R&I de l'UE Opens in new window Réseau de collaboration HORIZON Opens in new window Coût total € 251 857,80 Partenaires (1) Trier par ordre alphabétique Trier par contribution nette de l'UE Tout développer Tout réduire Partenaire Les organisations partenaires contribuent à la mise en œuvre de l’action, mais ne signent pas la convention de subvention. TRUSTEES OF PRINCETON UNIVERSITY États-Unis Contribution nette de l'UE € 0,00 Adresse NASSAU HALL 1 08544-2001 Princeton, Nj Voir sur la carte Type d’activité Higher or Secondary Education Establishments Liens Contacter l’organisation Opens in new window Site web Opens in new window Participation aux programmes de R&I de l'UE Opens in new window Réseau de collaboration HORIZON Opens in new window Coût total € 160 130,40
