Simulations and Foreground Radiation Modeling for Future Ultra-High-Precision Observations of the Cosmic Microwave

JAXA Supercomputer System Annual Report February 2025-January 2026

Report Number: R25EDU10506

Subject Category: Space and Astronautical Science

Responsible Representative: Ken EBISAWA, Dapartment of Astrophysics, ISAS
Contact Information: Ken EBISAWA(ebisawa.ken@jaxa.jp)
Members: Ken Ebisawa, Kiyoshi Ikuma, Ryosuke Moriguchi, Tamaki Murokoshi, Yuya Nagano, Shunsuke Okumura, Yuki Sakurai, Ryota Takaku, Masahiro Tsujimoto, Hayato Takakura, Issei Yamamura

Abstract

Using all-sky survey data from the Akari satellite, we will develop a model of galactic foreground radiation that is essential for analyzing data from future cosmic background radiation missions, such as LiteBIRD. We will conduct simulations necessary for determining the specifications and observation strategy of the LiteBIRD satellite.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

JSS is essential for analyzing vast amounts of all-sky data and conducting simulations.

Achievements of the Year

After purchasing an IDL license, we were able to run the pipeline processes written in IDL that the Akari team had been using on JSS.

Publications

- Oral Presentations

Glasscock, "Re-analysis of AKARI FIS with Cosmoglobe", ISAS astrophysics colloquium, 2026/03/11

Usage of JSS

Computational Information

Process Parallelization Methods: N/A
Thread Parallelization Methods: N/A
Number of Processes: 1
Elapsed Time per Case: 24 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 0.22

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

Computational Resources
System Name	CPU Resources Used (Core x Hours)	Fraction of Usage*2(%)
TOKI-SORA	0.00	0.00
TOKI-ST	1800919.86	1.86
TOKI-GP	0.71	0.00
TOKI-XM	0.00	0.00
TOKI-LM	29522.64	2.22
TOKI-TST	0.00	0.00
TOKI-TGP	0.00	0.00
TOKI-TLM	0.00	0.00

File System Resources
File System Name	Storage Assigned (GiB)	Fraction of Usage*2(%)
/home	1024.00	1.64
/data and /data2	102400.00	0.67
/ssd	30720.00	1.87

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	7.71	0.02

*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).

*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.

ISV Software Licenses Used

ISV Software Licenses Resources
	ISV Software Licenses Used (Hours)	Fraction of Usage*2(%)
ISV Software Licenses (Total)	0.00	0.00

*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.