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(1) Presentation(s)
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Jeu. 16/01/2025 14:00 Salle des Séminaires, Bâtiment 21, Etage 4 (à confirmer) BARUTEAU Clément (IRAP) Star-disc-planets interactions and the origins of structures observed in protoplanetary discs (LUPM) The classical picture of protoplanetary discs being smooth, continuous structures of gas and dust has been questioned by a decade of spatially resolved observations, primarily with SPHERE and ALMA. These observations have shown the widespread presence of rings, gaps, and large-scale asymmetries like spirals or arcs in the emission of protoplanetary discs. I will discuss whether such structures may be interpreted as signatures of the presence of unseen planets. Recent VLTI observations probing the innermost regions of protoplanetary discs might tell us a rather similar story, and I will present ongoing work on interpreting asymmetries in the discs emission inferred from near-infrared VLTI observations, based on on hydrodynamical simulations post-processed by dust radiative transfer calculations. If time allows, I will also report the finding of a new instability that we have recently found in protoplanetary discs. Pour plus d'informations, merci de contacter Morin J. |