Shanghai Astronomical Observatory Astrophysics Colloquium

Title：Neutral hydrogen intensity mapping with MeerKAT

Time：3:00 pm Dec. 22th (Thursday)

Speaker：Jingying Wang(SHAO)

Abstract：

Neutral hydrogen (HI) intensity mapping promises to be an exquisite way of mapping the large-scale structure of the Universe. The technique relies on measuring the integrated intensity of HI 21-cm emission on each pixel on the sky without actually resolving any galaxies. With the full array of 64 dishes, MeerKAT should be able to measure the distribution of hydrogen on very large scales if used in single-dish mode (instead of cross-correlating the dishes). This will allow probing of several cosmological parameters, such as the nature of dark energy. In this talk, I will briefly introduce the background of the MeerKLASS project and current progress, including the pilot survey, data calibration pipeline, signal detection strategy, and some troubles that radio cosmology observations are facing.

CV：

Dr. Jingying Wang （王婧颖） received her PhD at Shanghai Jiao Tong University in 2013. She completed her first postdoctoral program in the 21CMA group of NAOC between 2013-2016. She was a SKA-funded postdoctoral research fellow at the University of the Western Cape during 2016-2021 and worked on developing single-dish calibration pipelines for the MeerKAT and SKA1-MID arrays. In 2021 she joined SHAO. She is a core member of the SKAO cosmology SWG, and a co-lead of the HI intensity mapping Focus Group.