Huirong Yan (闫慧荣)

Bairen Research Professor
Room: 
202
Email: 
hryan[at]pku.edu.cn
Research interests: 
cosmic ray physics, ISM theories, astrophysical magnetic field, turbulence, dust dynamics, supernovae, cluster of galaxies, GRBs, accretion disk
Homepage: 
http://kiaa.pku.edu.cn/~hryan
Research Highlights: 

My research interests are to understand the fundamental MHD and plasma physics in various astrophysical problems, ranging from high energy astrophysics to interstellar medium. Currently, the specific topics that I'm interested in are:

  • Cosmic Ray Acceleration and Transport in MHD turbulence
  • Solar flares, space plasma
  • Supernova Remnants, GRBs
  • Astrophysical Magnetic Field and Atomic Alignment
  • Interstellar Dust Dynamics

Highlighted recent results:

1. Found that the runaway particles accelerated at the shock  can only have a spectrum >=2; and demonstrated that streaming instability plays an essential role in reducing the diffusion in the vicinity of shocks in spite of damping by background turbulence (Yan et al. 2012, ApJ)

2. Test particle simulations using input of 3D MHD simulations confirms our earlier nonlinear results of cosmic ray scattering as well as predictions for cross field transport (Xu & Yan 2013, ApJ, 779, 140)

3. Shock acceleration is modified in the presence of superdiffusion, which occurs if the integral scale of turbulence is larger than the scale of interest (Lazarian & Yan 2013 ApJ, in press), leading to comparable acceleration efficiency between parallel shock and perpendicular one.