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Past Events
Numerical Simulations of Spiral Structure
| Speaker: | Dr. Wing-Kit LEE |
| Affiliation: | Institute of Astronomy & Astrophysics of the Academia Sinica (ASIAA) |
| Date: | July 31, 2014 (Thu) |
| Time: | 2:30 p.m. |
| Venue: | Room 522, 5/F, Chong Yuet Ming Physics Building, HKU |
Abstract
Nearly periodic substructure in the spiral arm is commonly found in the nearly grand-design spiral galaxies. Based on the theory of spiral density wave, Lee and Shu proposed a possible mechanism of generating these feather-like structures through the Feather Instability (FI) (Lee & Shu, ApJ 2012). Both self-gravity and magnetic field are found to be the important parameters governing the instability. In this talk, I will present some ongoing work to understand the nonlinear regime of FI by using numerical MHD simulations.
Coffee and tea will be served 20 minutes prior to the seminar.