摘要

A major scientific goal of the James Web Space Telescope (JWST) is to probe the epoch of reionization of the Universe at z above 6, and up to 20 and beyond. At these redshifts, galaxies are just beginning to form and the observable objects are early black holes, supernovae, and cosmic infrared background. The JWST has the necessary sensitivity to observe these targets individually, but a wide field survey is needed to discover these black holes and supernovae and to cover the area large enough for cosmic infrared background to be reliably studied. This enabling survey will also discover a large number of other transients and enable sciences such as supernova cosmology out to z = 5, star formation history at high redshift through supernova explosions, faint stellar objects in the Milky Way, and galaxy evolution up to z approaching 10. The results of this survey will also serve as an invaluable target feeder for the upcoming era of ELT and SKA.

报告人简介

My colleagues and I are endeavoring to build an astronomical observatory at Dome A, the highest point in Antarctica. We hope to set up a number of telescopes in the coming years to study the mysterious dark energy in the universe.My research interests include also spectropolarimetry observations of supernovae. The supernovae I study are so far away that even the largest telescopes in the world cannot resolve their shapes through direct imaging. Spectropolarimetry is a technique that enables geometric structures of supernovae to be studied.Most recently I am working on finding supernovae at redshifts above 4.