发稿时间:2019-09-16浏览次数:10

USTC Astronomy Colloquium Series: 2019 Spring
What is beyond the “visible” galaxy?
Jiangtao Li  博士
University of Michigan, Ann Arbor
2019/9/17, 4:00pm , the 19th-floor Observatory Hall
Beyond the stellar light of the galaxy which is visible in broadband optical emission, there exist multi-phase gases, dust,cosmic ray, and magnetic field, which more or less fill in the dark matter halo or even to larger scale. These matters are often called the circum-galactic medium (CGM), which play a critical role in the co-evolution of galaxies and their environments. I will briefly overview the basic observational methods and key results of existing multi-wavelength observations of the multi-phase CGM. I will show that although the CGM is ubiquitous around nearby galaxies, the physics related to the CGM, as well as the role of CGM is galaxy formation and evolution, are still poorly understood. Some new observations with future space- and/or ground-based facilitieswill help us to better understand the CGM.
 Dr. Jiangtao Li is an assistant research scientist at the University of Michigan, Ann Arbor. He got his Ph.D. from Nanjing University in 2010. He conducted postdoc research at the University of Massachusetts, Amherst from 2010-2012, CEA, Saclay in France from 2012-2014, and the University of Michigan, Ann Arbor from 2014-2018, respectively, where he was promoted to be an assistant research scientist in 2018.