Tomomi Sunayama

My current research focuses on accurate physical modeling of systematics in cosmological analyses using galaxy clusters and developing a way to identify high-redshift galaxy clusters by jointly using data from photometric and spectroscopic galaxy surveys. The coming decade of cluster cosmology will be interesting, as the next-generation X-ray and optical cluster surveys (e.g., e-ROSITA and LSST) are expected to detect more than 100,000 galaxy clusters.

I am currently a co-leader of the Prime Focus Spectrograph (PFS) Cosmology working group, which is an ongoing spectroscopic galaxy survey using 8m Subaru telescope to map about 4 million emission-line galaxies up to z=2.4.My research group creates detailed simulations of galaxies like the Milky Way and its neighbors and utilize large volume cosmological simulations in order to understand the nature of dark matter and the physics of galaxy evolution.

I also serve as a pipeline scientist for the LSST DESC Cluster WG, working on the development of the cluster cosmology pipeline to meet the precision requirements of the DESC