发稿时间:2022-10-30浏览次数:10

USTC Astronomy Colloquium Series: 2022 Fall
Cosmic Evolution of Star Formation, Cold Molecular Gas and Dark Matter in Galaxies
刘岱钟  博士
Max Planck Institute for extraterrestrial Physics
2022/11/1, 16:00pm ,TencentMeeting:716-986-621
报告人:

Education:

·       2006-2010, B.S., Nanjing University, with Prof. Qiusheng Gu.

·       2010-2016, PhD, Purple Mountain Observatory, Chinese Academy of Sciences, with Prof. Yu Gao.

o   During 2014-2015, visiting PhD under CAS-CNRS Joint PhD Program, CEA Saclay, France, with Dr. Emanuele Daddi.

Employment:

·       2016-2020, post-doc, Max Planck Institute for Astronomy (MPIA), Heidelberg, Germany, with Dr. Eva Schinnerer.

·       2020-present, post-doc, Max Planck Institute for extraterrestrial Physics (MPE), Garching, Germany, with Profs. Reinhard Genzel, Linda Tacconi and Natascha Förster Schreiber.

Research interest:

·       Galaxy evolution, cosmic star formation, interstellar medium, dark matter.

·       Infrared/(sub-)millimeter/radio observations, ISM molecular/atomic excitation and radiative transfer, large-survey photometry and SED fitting techniques.

Major Collaborations:

·       PHANGS Collaboration (ALMA, MUSE, HST and JWST large surveys on local galaxies' ISM and star formation, website: phangs.org)

·       COSMOS Collaboration (The largest JWST Cycle 1 program COSMOS-Web on galaxy evolution and early Universe, website: cosmos.astro.caltech.edu)

·       AtLAST Consortium (Future European 50-m sub-millimeter telescope project, website: atlast.uio.no)

 

摘要:
Galaxies have undergone rapid evolution over more than ten billion years of cosmic time. Surveys of high-redshift galaxies in deep fields with world-class observing facilities (e.g., Hubble, Spitzer and Herschel Space Telescopes, and the ALMA interferometer) have led to great advances in our knowledge of galaxy stellar mass assembly and star formation evolution, and recently the cold molecular gas and dark matter fraction in galaxies. In this talk, I will present the our latest studies of the cosmic star formation rate and cold molecular gas densities and dark matter fractions, using the largest samples of high-redshift galaxies up to redshift z~6 in deep fields. We developed photometric + spectral energy distribution (SED) “super-deblending” technique to exploit the Herschel surveys in these deep fields, and developed an automatic mining system (A3COSMOS) to exploit the public ALMA (sub-)mm science archive. These gave us the largest sample of dusty star-forming galaxies with which we can trace the obscured cosmic star formation rate density and cold molecular gas density out to z~6. In addition, with deep integral field unit (IFU) observations and cutting-edge 3D forward kinematic modeling, we further constrained for the first time the dark matter fractions for one hundred massive galaxies in the Cosmic Noon (z~1-2). These results build up the precise descriptions of galaxy evolution across cosmic time, which are critical to theories and cosmological simulations. Finally, I will present an outlook on the near future of galaxy evolution, where with deep and wide JWST (e.g., the largest JWST Cycle 1 program, COSMOS-Web) and ALMA/NOEMA/JVLA/MeerKAT surveys we will unveil the mysterious, very early Universe (z>6).