演講資訊

摘要：

Understanding galaxy evolution requires detailed observations across multiple wavelengths, particularly in the infrared (IR) regime. With the unprecedented sensitivity of the James Webb Space Telescope (JWST) in the mid-infrared (MIR), we derived new insights into the cosmic star formation history (CSFH). Our study utilized MIR source counts spanning several tens of times fainter fluxes than those detected by previous infrared telescopes, revealing galaxies at sub-μJy flux levels. By employing evolution models of local luminosity functions (LLFs) for various galaxy types, we reproduced the observed source counts across multiple MIR bands of JWST.

This talk will highlight the evolution of different types of galaxies and star formation activity, explored through IR spectral energy distributions (SEDs) and luminosity functions. We will also discuss how our findings refine models of cosmic evolution, shedding light on the dominant galaxy populations contributing to galaxy evolution. The role of JWST's data bridging gaps by previous telescopes, with previously undetected faint galaxies, will show a more comprehensive view of CSFH. I will briefly summarize our team's expertise and present recent findings since our research group specializes in exploring the interplay between star formation and AGN activity using cutting-edge data from JWST and AKARI.