[Loclphys] Colloquium Announcement for (Dr. Wick Haxton) 3/30/2010

[Malin, Delicia M.]

Old Dominion University
Department of Physics

Spring Colloquium Series

Tuesday March 30, 2010

"Solar Neutrinos and Planetary Formation"

Dr. Wick Haxton
Berkeley




I will review what we have learned from solar neutrinos the past decade or so, then discuss an anomaly that has arisen in the standard solar model more recently --a disagreement between a tests of surface metalicity (photospheric absorption lines)and interior metalicity (helioseismology). I will explain how future solar neutrino experiments might check this discrepancy, and why it could be important to do so. A speculative possibility is that the discrepancy is real, and connected with a very interesting stage of solar system formation -- the last million years of the nebular disk, when planets are thought to have formed. I will describe what planetary probes have taught us about the planets as metal reservoirs, and discuss the dynamics of the nebular gas that the planets must have "scrubbed" to segregate that much metal. This leads to a speculative possibility, that a signature of planetary formation might be encoded in solar composition.

Presentation: Physical Sciences Building II 1100 @ 3:00 pm
Refreshments: 1st Floor Atrium @ 2:30 pm

More details at http://www.physics.odu.edu
All are Welcome!

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