Physics Colloquium

When

Dec. 2, 2016, 3:30pm to 5pm

Campus Location

Office/Remote Location

Room 217

Description

Michail Petaev
Harvard University

Physico‐chemical modeling of condensation in the early Solar system:

Why are condensation models needed?

  • The planet‐forming inner region in a physical model of solar nebula introduced by Cameron (1963) was totally vaporized.
  • Therefore, before making planets nebular gas had to condense and accumulate into planetary building blocks or planetesimals (@ meteorite parent bodies) made up of chondritic meteorites.
  • While now it is clear that neither of these postulates is correct, modeling nebular condensation still remains a powerful tool for understanding and, in some cases, predicting both mineralogical and chemical evolution of nebular reservoirs in which the Solar System objects have formed.
  • Another important application of such models is to evaluate mineralogy and chemistry of extrasolar planets orbiting stars chemically different from our Sun.
  • The purpose of this presentation is to overview existing condensation models and to discuss their strengths and weaknesses using several examples
  • First, I will introduce you in mineralogy and chemistry of chondritic meteorites
  • Then describe equilibrium and non-equilibrium condensation models based on my own work
  • Specifically discuss the concept of 50% condensation temperatures that is widely used in planetary studies, including exoplanets
  • And describe application of condensation models to understanding origin and evolution of meteoritic objects and Moon

Refreshments at 3:30 p.m./Lecture at 3:45 p.m.

Admission Information

This event is free and open to the public.

Contact Information

Physics and Astronomy Department
Natasa Korceba

External Sponsor

Physics and Astronomy Department