Seminar:- Probing the evolving Universe with light
The Universe is expanding. As it expands, substances and the invisible magnetic fields permeating the cosmos also evolve. This big picture, which emerged from many successful cosmological and astronomical observations, describes the Universe’s structure formation and evolutionary history in a broad brush. However, much is unknown about the fine details, such as when the first luminous objects and the first magnetic fields formed, what their properties were, and how they impacted subsequent structure development, leading to the current state of the Universe.
In this talk, the speaker will discuss how astrophysicists probe the evolving Universe, with foci on two research frontiers: large-scale cosmic magnetic fields and gas reionisation. These two themes have formed several key science projects for the forthcoming unprecedentedly powerful radio telescopes, the Square Kilometre Array(SKA), as well as its precursors (e.g. ASKAP, MeerKAT, MWA) and pathfinders (e.g. LOFAR). The speaker will highlight, with demonstrations, the essential ingredients to optimise the scientific gains from these observational experiments by studying how information is encoded into the radiation we receive (i.e., cosmological radiative transfer). Finally, She will conclude this talk with a summary of the key findings from her theoretical calculations and an outlook on the exciting developments in our understanding of the ever-changing cosmos.
講者：陳奕涵 博士 Dr. Jennifer CHAN Y. H.(Canadian Institute for Theoretical Astrophysics (CITA), Dunlap Institute for Astronomy & Astrophysics, University of Toronto(UofT) Arts & Science)