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From dust to planets and stars

Date: 6 juin 13:30 - 16:00

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Affichage4 contributions sur 4
Planets and planetesimals are formed in the gas- and dust-rich protoplanetary disks surrounding nascent stars in the first 10 Myr of their life. Planetesimals belts, or debris disks, that remain afterward are unique objets to study planetary systems that have evolved from these primordial structures. On one hand, optical/IR observations reveal small sized grains that are partly blown out the syst ... Plus
Présenté par Dr. Jean-François LESTRADE on 6/6/2019 à 12:00
Luminous Blue Variable (LBV) stars are evolved massive objects, previous to core-collapse supernova. LBVs are characterized by photometric and spectroscopic variability, produced by strong and dense winds, mass-loss events and very intense UV radiation. LBVs strongly disturb their surroundings by heating and shocking, and produce important amounts of dust. The study of the circumstellar material i ... Plus
Présenté par Ricardo RIZZO on 6/6/2019 à 13:00
Mapping the structure of interstellar magnetic fields in the cold gas of nearby galaxies is crucial to understand how magnetic fields influence gas dynamics in galaxies, and in particular the role of the field in regulating star formation, driving galactic outflows, and fuelling galactic nuclei. In this contribution, I will present our group's ongoing efforts to map the magnetic field structure i ... Plus
Présenté par Dr. Annie HUGHES
Saturn’s icy satellites, which are in synchronous rotation around Saturn, often present a different albedo on their leading and trailing sides, which interact differently with Saturn’s dusty rings. Because longer wavelengths probe deeper into the subsurface, observing both sides at a variety of wavelengths indicates possible changes in thermal and physical properties with depth. The Cassini mi ... Plus
Présenté par Ms. Lea BONNEFOY on 6/6/2019 à 12:30
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