Observing the millimeter Universe with the NIKA2 camera

Session

From dust to planets and stars

6 juin 2019, 13:30

34. Debris disks around stars in the NIKA2 era

Dr Jean-François Lestrade (Observatoire de Paris)

06/06/2019 14:00

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...

19. Probing the subsurface of the two faces of Iapetus

Mlle Lea Bonnefoy (LESIA/LATMOS)

06/06/2019 14:30

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...

57. Galactic LBV stars and their circumstellar material surveyed by NIKA2

Ricardo Rizzo (CAB)

06/06/2019 15:00

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...