DIOS: the dark baryon exploring mission
T. Ohashi (Tokyo Metropolitan University), Y. Ishisaki (Tokyo, Metropolitan University), Y. Ezoe (Tokyo Metropolitan University), S. Yamada, (Tokyo Metropolitan University), S. Yamaguchi (Tokyo Metropolitan, University), N. Miyazaki (Tokyo Metropolitan University)
TL;DR
DIOS is a small satellite designed to detect warm-hot intergalactic medium using high-resolution X-ray spectroscopy, aiming to explore cosmic plasma dynamics across various spatial scales.
Contribution
The paper introduces the DIOS mission concept, detailing its design, instrumentation, and potential scientific capabilities for studying intergalactic medium.
Findings
Design of TES microcalorimeter system for DIOS
Potential to observe gas dynamics from Earth's magnetosphere to galaxy clusters
Optimized payload design for small satellite constraints
Abstract
DIOS (Diffuse Intergalactic Oxygen Surveyor) is a small satellite aiming for a launch around 2020 with JAXA's Epsilon rocket. Its main aim is a search for warm-hot intergalactic medium with high-resolution X-ray spectroscopy of redshifted emission lines from OVII and OVIII ions. The superior energy resolution of TES microcalorimeters combined with a very wide field of view (30--50 arcmin diameter) will enable us to look into gas dynamics of cosmic plasmas in a wide range of spatial scales from Earth's magnetosphere to unvirialized regions of clusters of galaxies. Mechanical and thermal design of the spacecraft and development of the TES calorimeter system are described. We also consider revising the payload design to optimize the scientific capability allowed by the boundary conditions of the small mission.
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