|Speaker:||Tomotake Matsumura (ISAS/JAXA)|
|Title:||Physics of the early universe using the measurement of comics microwave background polarization and path forward in next 15 years using a satellite|
|Date (JST):||Fri, Jan 22, 2016, 13:30 - 15:00|
|Place:||Seminar Room A|
The measurement of the cosmic microwave background (CMB) radiation has been providing rich data to study the physics of early universe. In recent years, an idea of cosmic inflation is identified as a leading paradigm to explain the unexplained observational evidences in modern cosmology. While the inflation hypothesis is to describe a physical event as early as 10-38 sec after the beginning of the universe, it is experimentally testable using the measurement of the CMB polarization. Today, there is a worldwide competition to hunt this signal.
While experimental efforts are under progress from the ground and balloon platforms, a community is now awaiting for a dedicated satellite to probe the primordial B-mode signal. LiteBIRD is a next generation satellite project that is specifically designed to measure the B-mode signal from the inflation. The goal sensitivity of LiteBIRD is delta_r < 0.001, and this sensitivity probes the major inflation models. In this talk, I will describe the mission overview and the project status of LiteBIRD. I will also discuss the expected role of the next generation CMB polarization satellite and the challenges in the next 15-year time scale.