Supernovae are among the most powerful events in the Universe, driving the chemical and energetic evolution of galaxies. Yet the physical mechanisms governing these explosions, especially for thermonuclear Type Ia supernovae, remain poorly understood. In this seminar, I will show how X-ray observations of supernova remnants provide unique insights into explosion physics long after the event. Focusing on Tycho’s supernova remnant, I will present how high-resolution X-ray imaging thanks to the Chandra’s telescope (NASA) reveals the three-dimensional structure, chemical stratification, and dynamical asymmetries of the ejecta, which retain direct imprints of the explosion process. I will then discuss how high–spectral-resolution X-ray spectroscopy with XRISM (JAXA/NASA) allows us to directly probe new properties as the front and rear sides of the remnant. These observations offer strong constraints on competing Type Ia explosion models and open a new window on the physics of stellar explosions.
Local contact: Thierry FOGLIZZO
Organisation: Frédéric GALLIANO
DAp