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Accueil > Séminaires et conférences > Séminaires, soutenances de thèses et HDR précédents > 2018 > Séminaires 2018 > Le mercredi 28 novembre 2018 à 11h

Le mercredi 28 novembre 2018 à 11h


A series of interdisciplinary seminars organised by the LERMA, LPP and LULI laboratories

Location : Sorbonne Université, Campus Pierre et Marie Curie, 4 Place Jussieu, Paris Hall 24-34, 5th floor, room 509

Time & Date : 11:00 — Wednesday 28th of November 2018

Title : ​​Evolving supernova explosions to supernova remnants through 3D MHD modeling : the case of SN 1987A

Abstract : ​The remnants of core-collapse supernovae (SNe) have complex morphologies that may reflect asymmetries and structures developed during the progenitor SN explosion. Here we present the first results of a PRACE large numerical project aimed at investigating how the morphology of the remnant of SN 1987A reflects the characteristics of the progenitor SN. We describe the evolution of SN 1987A from the onset of the SN (soon after the core-collapse) to the remnant development through 3D MHD modeling. The initial condition is a blue supergiant which describes in detail the main characteristics of the stellar progenitor of SN 1987A. We perform multi-species simulations to follow the evolution of the isotopic composition of ejecta for 50 yr. By comparing the model results with the optical and X-ray observations, we identify the physical and geometrical features of the asymmetric explosion which causes the Doppler shifts in emission lines of heavy elements and the asymmetries in the distribution of ejecta as revealed in different wavelength bands. We also infer new upper limits on the bolometric luminosity of the central compact object.

Speaker :​ Salvatore Orlando, INAF-Osservatorio Astronomico di Palermo

About the speaker : ​​Salvatore Orlando is a researcher working at the INAF-Osservatorio Astronomico di Palermo in Italy. He graduated in physics from the University of Palermo and completed his PhD at the same university. During his PhD he spent part of this time at the Dept. of Astronomy and Astrophysics at the University of Chicago. Prior to his current position, he was a research fellow at the European Space Agency (ESA), Space Science Dept. (Noordwijk, The Netherlands). His main research activity has been performed in the realm of optically thin astrophysical plasmas (more specifically solar and stellar coronae, young stellar objects, and supernova remnants) and in the field of thermal and non-thermal (synchrotron) emission processes.

Tutelles : CNRS Ecole Polytechnique Sorbonne Université Université Paris Sud Observatoire de Paris Convention : CEA
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Hébergeur : Laboratoire de Physique des Plasmas, Ecole Polytechnique route de Saclay F-91128 PALAISEAU CEDEX
Directeur de la publication : Pascal Chabert (Directeur)