Coming Seminars
Seminars in May
Speaker
Ichiki Kiyotomo
Date/Place
13:30-, 14(Wed), May. @ES606
Title
What does Planck tell us about inflation? - and beyond -
Abstract
The scattering of cosmic microwave background radiation (CMB) in galaxy clusters induces a polarization signal according to the quadrupole anisotropy of the photon distribution at the location of the cluster. This "remote quadrupole" derived from measurements of the induced polarization provides an opportunity to reconstruct primordial fluctuations on large scales. By comparing the local quadrupole of the CMB predicted by the primordial fluctuations reconstructed in this way with direct observations by CMB satellites, we discuss how the dark energy can be tested by CMB observations beyond the indefinite nature of the cosmic variance.
Speaker
Shuichiro Yokoyama
Date/Place
13:30-, 7(Wed), May. @ES606
Title
What does Planck tell us about inflation? - and beyond -
Abstract
Recent precise CMB measurements, such as Planck and BICEP/Keck, have given us a deeper understanding of cosmic inflation.In fact, conventional simple models (e.g., proposed in the early '80s) are in tension. In this talk, I would like to give a brief review of inflation, in particular, introduce how to classify the slow-roll inflationary models on the ns-r plane. I would also like to talk with you about what to expect in the future.
Seminars in April
Speaker
Shun Arai
Date/Place
13:30-, 30(Wed), Apr. @ES606
Abstract
Gravitational lensing has been a remarkable observational tool for over the
past century, providing insights into gravitational physics through its
relativistic and geometric signatures. Meanwhile, the large-scale structure
(LSS) of the Universe encapsulates the dynamic interplay between
gravitational infall and cosmic expansion. Recent literature of cosmology
has drawn the attention to utilise gravitational lensing of the cosmic
microwave background (CMB lensing), sourced by LSS, to reveal the detailed
evolutionary history of cosmic structures, especially during their early
formation stages at high redshifts (z > 1).
In this seminar, we will introduce the concept of "CMB-lensing tomography,"
a method that employs angular two-point correlation statistics measured
across distinct redshift slices. We will outline a strategic programme
aimed at achieving precise CMB-lensing tomography at high redshifts. To the
last minutes, we will illustrate this methodology using recent observations
of Lyman-break galaxies obtained with the Subaru Telescope.
Speaker
Akira Ishikawa
Date/Place
13:30-, 23(Wed), Apr. @ES606
Title
Self Introduction
Abstract
Self Introduction
Speaker
Huyuko Tanaka
Date/Place
13:30-, 23(Wed), Apr. @ES606
Title
Self Introduction
Abstract
Self Introduction
Speaker
Ryota Himeno
Date/Place
13:30-, 23(Wed), Apr. @ES606
Title
Self Introduction
Abstract
Self Introduction
Speaker
Taisuke Makino
Date/Place
13:30-, 16(Wed), Apr. @ES606
Title
Self Introduction
Abstract
Self Introduction
Speaker
Nobuhusa Kobayashi
Date/Place
13:30-, 16(Wed), Apr. @ES606
Title
Empirical Galaxy Formation Modeling
Abstract
Self introduction
Speaker
Kiyotomo Ichiki
Date/Place
13:30-, 16(Wed), Apr. @ES606
Title
Policy speech
Abstract
Policy speech