Thursday, March 13, 2014

Microgravity Experiments On The First Steps of Planet Formation

Florida Space Institute Seminar Announcement

Speaker: Julie Brisset
Affiliation: University of Braunschweig, Germany
Day and Date: Wednesday, March 19, 2014
Time: 2:00 – 3:00 pm

Location: Partnership 1, Research Parkway
Building 8111, Orlando, Florida
Room 209
Title : Microgravity Experiments On The First Steps of Planet Formation
Abstract :
In the very first steps of planet formation, dust particles inside the protoplanetary disk collide with each other and grow from micrometer sizes to aggregates of a few centimeters. In order to investigate the dust collision behavior at low velocities, the SPACE (Suborbital Particle Aggregation and Collision Experiment) set-up was flown at the drop tower in Bremen, Germany (9 s of microgravity time), and on the REXUS 12 suborbital rocket from Kiruna, Sweden (170 s of microgravity time). The results of these experiments allowed for the measurement of critical collision properties of sub-mm-sized dust aggregates, especially in the transition regimes between sticking, bouncing and fragmentation. In particular, the formation and characteristics of clusters composed of a high number of aggregates were observed and yielded relevant information for future protoplanetary disk simulations.

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