I present the latest results from a JWST Cycle 1 GO program, in which 12 of the lowest-luminosity z>6 quasars selected from the deep Subaru/HSC survey are observed with NIRCam imaging and NIRSpec Fixed-Slit spectroscopy. We have successfully detected stellar light of quasar host galaxies in NIRCam F150W and F356W images, which straddle the redshifted 4000 angstrom break. A self-developed image decomposition technique was applied to detect the dim light of host galaxies. Stellar absorption lines are detected in the NIRSpec rest-frame optical spectra of two targets, for which we perform a joint analysis to investigate their stellar populations based on the imaging and spectroscopic data. I will discuss the galaxy - BH co-evolution at z=6 based on the host stellar masses and virial BH masses derived from the JWST data. I will also present our future prospects for the coming JWST cycles as well as some other ongoing JWST projects that I am involved in.
BIO
My main research interest is early growth history of supermassive black holes and the relation to their host galaxies. Since my PhD years at NAOJ in Japan, I have been involved in a z>6 quasar discovery project based on the Subaru HSC survey. I have been leading several JWST proejcts using the first-year data.
2021-2023: postdoc, Kavli Astrophysics Fellow, KIAA
2018-2021: postdoc, MPIA Heidelberg
2013-2018: PhD, NAOJ, Japan. supervisor: Prof. Nobunari Kashikawa
