A scientific paper by Mr. Takase, a third-year doctoral student in our laboratory, has been published in the Italian Journal of Cosmology and Astroparticle Physics (JCAP).
The paper proposes an optimal observation method for future satellite observations to validate inflationary models from polarimetric observations of the cosmic microwave background (CMB) radiation, and provides important guidelines for the design of future next-generation CMB polarimetric observation satellites. This research has been introduced in a press release by Okayama University and in Research Highlights.
Ishino Lab. is in charge of systematic error analysis and scan strategy design for LiteBIRD, a CMB polarimetric observation satellite led by the Japan Aerospace Exploration Agency (JAXA).
LiteBIRD is a scientific project that aims to verify inflation, which is believed to have occurred at the birth of the universe, by observing the polarization of the CMB in the entire cosmic sky with high precision. (For details, please see Research Activities)
In order to observe the entire sky of the universe, the satellite will rotate itself at the second Lagrangian point, 1.5 million km away from the earth, to scan the universe (Figure 1).
The key to highly accurate observation of the polarization of the CMB is to suppress systematic errors that originate in the observation equipment. In this study, we found the scan strategy parameters that minimize systematic errors by optimizing the angle and rotation speed of the satellite’s rotation axis.
For more information, please see the following press release/Reserch Highlights article.
Okayama University Press Release
誕生直後の宇宙の姿、衛星観測でどう捉えるか (Japanese)
Research Highlights
How to capture the universe after its birth through space observation (English)
Paper information
Title: Multi-dimensional optimisation of the scanning strategy for the LiteBIRD space mission
Authors：Y. Takase, L. Vacher, H. Ishino, G. Patanchon, L. Montier et al., LiteBIRD collaboration
DOI: 10.1088/1475-7516/2024/12/036
Link: https://iopscience.iop.org/article/10.1088/1475-7516/2024/12/036