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The period from Dark Ages to Epoch of Reionization (EoR) is milestone in the cosmic evolutionary history, which is crucial to understand the formation and evolution of the first population of stars, black holes, and galaxies. Cosmic 21cm line signal emitted from neutral hydrogen atom is key observable during the EoR. Recently the 21cm line cosmology has been developing both theoretically and observationally. The SKA telescope is scheduled to start observation in 2027. In my talk, I will briefly summarize the basics of the 21cm line physics , current theoretical and observational progresses, and SKA project. I also introduce our approach to analyze the 21cm line signal with artificial neural networks (ANNs), which is a machine learning technique. If you are interested, please see following reference.
Referece:
“21cm cosmology in the 21st century” J, Pritchard & A,Loeb (astro-ph/1109.6012)
“Cosmology at low frequencies” S. Furlanetto (astro-ph/0608032)
“In the beginning : the first sources of light and the deionization of the universe” R,Bakana & A,Loeb (astro-ph/0010468)
Dr. Hayato Shimabukuro is a tenure-track research associate professor in Yunnan university, SWIFAR. His main research interest is the epoch of reionization and 21cm cosmology. He obtained his Ph.D in 2016 from Nagoya university. During 2016/4-2018/3, he worked in Paris observatory (Paris) as a postdoc. From 2018/3-2019/12, he worked in Tsinghua university (Beijing) as Tsinghua international postdoc fellowship. From 2019/12 to present, he works in Yunnan university. He is a member of SKA international EoR team, SKA-China EoR team and chair of SKA Japan EoR team. His hobby is weight training and learning Chinese.