Collimated supersonic jets emerge from many types
of objects surrounded by disks of accreting material, including the
nuclei of galaxies, X-ray binaries, and young stars. Jets from young
stars radiate emission lines, so it is possible to measure radial velocities
and densities throughout the flow. These jets are easily resolved spatially
with the Hubble Space Telescope, and have detectable proper motions in only
a few years. This talk will explore what we can learn by following the
movement of shock waves in the jet, and will consider how jets interact with the
surrounding medium to drive less-collimated molecular flows. I will also
present the first results from a new observational project aimed at measuring
physical conditions and collimation properties of young stellar jets at subarcsecond
distances from the star that help to constrain how disks drive jets in these systems.
Tuesday, November 11th
Seminar is to be held at 4:00 PM in the conference room
on the second floor of Dearborn Observatory
Refreshments will be served at 3:30
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