SHAO Astrophysics Colloquia 

Studying Galaxy Population in the Big Data Era
Speaker: Yingjie Peng (KIAA/Peking University)
Time & Place: Wednesday, 3:00pm, January 20th, Lecture Hall, 3rd floor
Abstract: The galaxy population appears to be composed of infinitely complex different types and properties at first sight. However, when large samples of galaxies are studied, it appears that the majority of galaxies just follow simple scaling relations while the outliers represent some minority. We demonstrate the astonishing underlying simplicities of the galaxy population emerged from large galaxy surveys and “reverse engineering” of the observed galaxy population at different epochs; derive the analytical forms for the dominant evolutionary processes that control the galaxy evolution. On the other hand, gas regulation is one of the keys to understanding galaxy formation and evolution, as gas regulation depicts the dynamical interplay of the key physical processes in galaxies: gas inflow, star formation, outflow and metal production. I will introduce how the gas regulation acts in galaxies and its dynamical behaviours, and discuss how to apply the gas regulation method to study the evolution of the galaxy population, including the scientific topics that demand forthcoming observing facilities such as MOONS for VLT and future TMT, ELT


The Astrophysics division is the main group engaged in astrophysical research at Shanghai Astronomical Observatory. Research areas include active galactic nuclei and high energy astrophysics, galaxy formation and evolution, cosmology and large scale structure, star clusters and the structure of the Milk Way, star formation, and planetary astrophysics. There are now 45 faculty members, 16 postdocs, and 65 graduate students in the division.

The Astrophysics division maintains close partnerships with many astronomical research institutes, including the joint Key laboratory of research in galaxies and cosmology of CAS with University of Science and Technology of China, the joint astrophysics center with Xiamen University. Members of the astrophysics division also participate in many international and domestic astronomical projects, including LAMOST, HXMT, FAST, the Sloan Digital Sky Survey IV, TMT, LSST, etc.


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