Various 21 cm signals from neutral hydrogen have been proposed to probe the cosmic dawn, including the global 21 cm spectrum, the 21 cm tomography, and the 21 cm forest. They will provide valuable insights into the early structure formation during the cosmic dawn, and have been identified as one of the key scientific goals for a number of ground-based and space-borne radio experiments, including the international Square Kilometre Array and the Hongmeng project. In this talk, I’ll talk about some of the recent research progresses on the 21 cm probes for the cosmic dawn. I will also introduce the Hongmeng project, which is going to measure the global 21 cm signal on lunar orbit.
Bio:
Yidong Xu got her PhD from Peking University in 2011, and is now an associate research professor at the National Astronomical Observatories, Chinese Academy of Sciences. She mainly works on cosmic dawn and reionization, and the various 21 cm probes. She is a member of the Hongmeng collaboration, and also a member of both the SKA CD/EoR Science Working Group and the SKA Cosmology Science Working Group.
Tencent Meeting: 849-902-224
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Prof. Haipeng An