Geophysics Department Seminar - "Comparative Planetology: Volcanic moons, giant magnetospheres, and hidden oceans" - Dr. Carol Paty, Georgia Tech

Thursday, April 13, 2017

12:00 pm

Mitchell 350/372

Sponsored by:
Geophysics Department

Comparative Planetology: Volcanic moons, giant magnetospheres, and hidden oceans

Planetary magnetic fields play an important role in determining planetary evolution by
governing the interaction of atmospheres and surfaces with the solar wind, and give
important clues to internal planetary structure. The magnetospheres of Jupiter and Saturn
are incredibly dynamic despite their distal locations from the sun. They are also quite
different from the Earth’s magnetosphere in that each posses a volcanically active moon
that provides a continuous source of material to the inner magnetosphere. At Saturn,
Enceladus was discovered to have a plume of material emanating from fractures at the
southern polar cap which supplies the material for Saturn’s E ring as well as an extended
neutral cloud. Jupiter’s volcanically active moon, Io, provides over a ton of ionized material
per second to the magnetosphere. By studying these diverse systems with simulations and
observations we further our understanding of fundamental magnetospheric processes and
gain insight into the evolution of Earth’s near-space environment. In this talk I will explore
both the global and local interactions of icy moons with gas giant magnetospheres.
Specifically, the global influence small moons can have on large magnetospheres will be
discussed, along with how these effects are observed and characterized. I will also examine
the interaction of icy moons with the local flow of magnetized plasma and detail how we
can use the large-scale magnetosphere to probe the interiors of these moons in the context
of the Galileo Mission and the upcoming Europa CLIPPER Mission.

When:
Thursday, April 13, 2017
12:00 pm – 01:15 pm
Where:
Mitchell 350/372
Tags:

Seminar Science 

Audience:
Faculty/Staff, Students, Alumni/Friends
Contact:
650.497.3498, mbrunner@stanford.edu