Résumé / Abstract Journal-club_Postdoc

Journal-club Postdoc

« Detection of Hydrogen in the ß Pictoris gas disk »

Paul Wilson

The young and nearby star ß Pictoris is surrounded by an debris disk
composed of dust and gas known to host a myriad evaporating exocomets,
planetesimals and at least one planet. Observations of debris disks,
such as the one surrounding ß Pictoris, are important as they provide us
with clues about the mechanisms of planet formation. The analysis of the
gas in the disk allows us to directly estimate the physical conditions
in the disk such as density, composition, temperature and in some cases
bulk velocities, all of which provide important clues to exoplanet
formation theories. In my talk I will present new results on measuring
the abundance of the key species H, C, N and O in the ß Pictoris gas
disk using the Cosmic Origins Spectrograph instrument on the Hubble
Space Telescope.
mardi 31 mai 2016 - 11:00
Salle des séminaires Évry Schatzman, Institut d'Astrophysique
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