SHAO Astrophysics Colloquia

The Untold Stories of Andromeda: A High Definition View of The Circum-nuclear Environment in M31 with HST

Speaker: Zhiyuan Li(NJU)

Time: Wednesday, 3:00pm, Dec. 23, 2015

Location: Lecture Hall, 3rd floor

The Andromeda galaxy (M31), which harbors the nearest LINER and the closest stellar bulge accessible in the optical, is an ideal laboratory for studying the physical regulation of galactic nuclei, and in turn the co-evolution of super-massive black holes and their host galaxies. In this work, I will provide an overview of the stellar and interstellar components that together define the circumnuclear environment in M31, and report our recent series of work based on multi-band HST images of this region, which have led to exciting discoveries including a steep extinction law, an intermediate-age stellar population, as well as hundreds of planetary nebula candidates. I will close with a brief introduction of our ongoing multi-wavelength campaign to advance our understanding of this unique galactic circumnuclear environment.

Seminar talk

Title: Turbulent Amplification of Magnetic Fields at Shocks in ICM and ISM

Speaker: Suoqing Ji (季索清)

Time: Dec. 21 (Monday), 3 pm

Venue: The middle conference room on the third floor

Abstract: Turbulent dynamo field amplification has often been invoked to explain the strong field strengths in thin rims in supernova shocks (~ 100 µG) and in radio relics in galaxy clusters (~ µG). In this talk, we present high resolution MHD simulations of the interaction between pre-shock turbulence, clumping and shocks, to contrast compressional or Richtmyer-Meshov unstable amplification in both situations, and further demonstrate different mechanisms and features of magnetic field amplification between ICM and ISM. Last but not the least, I’ll briefly introduce the yt project (http://yt-project.org) which is a python package for analyzing and visualizing volumetric, multi-resolution data from astrophysical simulations (such as Enzo, FLASH, Gadget, etc.).

Group meetings and additional talks

Blackhole accretion theory and High-energy astrophysics Seminar

Location: 1608; Contact: Qixiang Yang < qxyang@shao.ac.cn>

http://202.127.29.4/fyuan/journalclub.html

Title: Acceleration of wind in optically thin and thick black hole accretion disks simulated in general relativity

Speaker: Defu Bu

Time: Friday, 10:00 am, Dec. 25, 2015
Radio Astrophysics Group Seminar yangkai@shao.ac.cn>

Location: 1617; Contact: Kai Yang<

Title:Molecular Clouds

Speaker: Fei Li

Time:

Location: Room 1617

Stellar Cluster and Galaxy Seminar group seminar

Location: 1617; Contact:

http://cluster.shao.ac.cn/wiki/index.php/Seminar_Plan

 Title: A Hyper Suprime-Cam view of the interacting galaxies of the M81 group

Speaker:  Sakurako Okamoto

Time: Wednesday, 10:30am, Dec. 23, 2015
Monday, 10:30 am, 2015.12.21 Jian Fu<fujian@shao.ac.cn>