Tag: Sapienza

The acceleration of cosmic rays in supernova remnants depends on the interaction with the surrounding medium. The study: “Time evolution of the synchrotron X-ray emission in Kepler’s SNR: the effects of turbulence and shock velocity” of V. Sapienza (UNIPA/INAF-OAPA) appeared on ApJ

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The role of supernova remnants (expanding clouds produced by supernovae) in the acceleration of cosmic rays (high-energy particles present in various astrophysical environments) has been known since 1995. The discovery, made by astronomers from Kyoto University, was made possible by identifying the presence of non-thermal X-ray emission in the supernova remnant SN 1006. X-rays are a type of high-energy radiation

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Simulated the XRISM observations of the iconic supernova remnant SN1987 A. The study: “Probing Shocked Ejecta in SN 1987A: A novel diagnostic approach using XRISM−Resolve” of V. Sapienza (UNIPA/OAPA) accepted on ApJL

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SN1987 A is one of the most significant objects for studying supernova explosions and their remnants. This is because it is the only core-collapse supernova that has occurred relatively close to us (approximately 170000 light-years away, in the Large Magellanic Cloud) in the modern epoch. Therefore, it is the sole object of this type for which we have telescope observations

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Different regimes of particle acceleration in supernova remnants. The study: “A Spatially Resolved Study of Hard X-Ray Emission in Kepler’s Supernova Remnant: Indications of Different Regimes of Particle Acceleration” of V. Sapienza (UNIPA/OAPA) appeared on ApJ

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Cosmic rays are high-energy charged particles which continuously hit our planet. These particles are accelerated up to such high velocities in different astronomical environments, among which supernova remnants seems to be particularly important. These objects are nebulae in rapid expansion generated by the explosions of very massive stars. In supernova remnants, particle acceleration seems to occurr along the expanding shock

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