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Spitzer Lectures

2015 Spitzer Lecturer Nicolas Dauphas

Wednesday, May 20 – Colloquium
Meteorites, which are remnants of solar system formation, provide a direct glimpse into the dynamics and evolution of a young stellar object, namely our Sun. Much of our knowledge about the astrophysical context of the birth of the Sun, the chronology of planetary growth from micrometer- sized dust to terrestrial planets, and the activity of the young Sun comes from the study of extinct radionuclides such as 26Al (t1/2 =0.717 Myr). Drawing from my own work, I will review how the signatures of extinct radionuclides (short-lived isotopes that were present when the solar system formed and that have now decayed below detection level) in planetary materials influence the current paradigm of solar system formation. Particular attention will given to tying meteorite measurements to remote astronomical observations of YSOs and modeling efforts.

Monday, May 18
Magmatic timescales and redox conditions from iron isotope systematics
Thursday, May 21
Nebular controls on the compositions of planets
Friday, May 22
The Lunar isotopic crisis and the origin of the Moon
Wednesday, May 27
Stellar ashes in meteorites and the context of solar system formation

The colloquium will be followed by a reception.

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