Location: Sunshine Room on the 4th floor Meeting time: 2021/03/30 14:00-15:00 (CST)
Speaker: Siwei Zou（Peking University）
Observation of multiphase gas in the circumgalactic medium of high redshift galaxies
Siwei Zou Seminar
Abstract
Jets/winds are ubiquitously in association with different celestial objects. However, most of previous theoretical studies of them rely on numerical calculations, not being able to provide a more convenient way for understanding rather abundant observational results. Now we have obtained a general analytical solution for describing a magnetically dominated jet/wind. This solution is consistent with known theoretical results and numerical simulations, and can be used to interpret main observational results, such as jet shape configuration, acceleration profile (from non-relativistic to relativistic), and polarization pattern etc. Furthermore, the solution is applicable to, e.g., limb-brightening (a hollow jet), periodical signals (a helical jet), and “complex” proper motion pattern (a stratified jet) etc. I this talk, I will present the details of the theory, examples of comparing with observations, and a variety of predictions (ref.: arXiv, ApJ, accepted). __________