Searching for cosmic missing baryons with DIOS - Diffuse intergalactic oxygen surveyor

Yasushi Suto, Kohji Yoshikawa, Noriko Y. Yamasaki, Kazuhisa Mitsuda, Ryuichi Fujimoto, Tae Furusho, Takaya Ohashi, Manabu Ishida, Shin Sasaki, Yoshitaka Ishisaki, Yuzuru Tawara, Akihiro Furuzawa

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Approximately 30 to 50 percent of the total baryons in the present universe is supposed to take the form of wa arm/hot intergalactic medium (WHIM) whose X-ray continuum emission is very weak. In order to carry out a direct and homogeneous survey of elusive cosmic missing baryons, we propose a dedicated soft-X-ray mission, DIOS (Diffuse Intergalactic Oxygen Surveyor). The unprecedented energy resolution (∼ 2eV) of the XSA (X-ray Spectrometer Array) on-board DIOS enables us to identify WHIM with gas temperatures T = 106-7K and overdensity δ= 10-100 located at z < 0.3 through emission lines of OVII and OVIII. DIOS, which will hopefully be launched in several years time, promises to open a new window of detection and characterization of cosmic missing baryons and to provide yet another important and complementary tool to trace the large-scale structure of the universe.

Original languageEnglish
JournalJournal of the Korean Physical Society
Volume45
Issue numberSUPPL.
Publication statusPublished - 01-10-2004
Externally publishedYes

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baryons
intergalactic media
oxygen
large-scale structure of the universe
x rays
gas temperature
universe
spectrometers
continuums
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Suto, Y., Yoshikawa, K., Yamasaki, N. Y., Mitsuda, K., Fujimoto, R., Furusho, T., ... Furuzawa, A. (2004). Searching for cosmic missing baryons with DIOS - Diffuse intergalactic oxygen surveyor. Journal of the Korean Physical Society, 45(SUPPL.).
Suto, Yasushi ; Yoshikawa, Kohji ; Yamasaki, Noriko Y. ; Mitsuda, Kazuhisa ; Fujimoto, Ryuichi ; Furusho, Tae ; Ohashi, Takaya ; Ishida, Manabu ; Sasaki, Shin ; Ishisaki, Yoshitaka ; Tawara, Yuzuru ; Furuzawa, Akihiro. / Searching for cosmic missing baryons with DIOS - Diffuse intergalactic oxygen surveyor. In: Journal of the Korean Physical Society. 2004 ; Vol. 45, No. SUPPL.
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abstract = "Approximately 30 to 50 percent of the total baryons in the present universe is supposed to take the form of wa arm/hot intergalactic medium (WHIM) whose X-ray continuum emission is very weak. In order to carry out a direct and homogeneous survey of elusive cosmic missing baryons, we propose a dedicated soft-X-ray mission, DIOS (Diffuse Intergalactic Oxygen Surveyor). The unprecedented energy resolution (∼ 2eV) of the XSA (X-ray Spectrometer Array) on-board DIOS enables us to identify WHIM with gas temperatures T = 106-7K and overdensity δ= 10-100 located at z < 0.3 through emission lines of OVII and OVIII. DIOS, which will hopefully be launched in several years time, promises to open a new window of detection and characterization of cosmic missing baryons and to provide yet another important and complementary tool to trace the large-scale structure of the universe.",
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Suto, Y, Yoshikawa, K, Yamasaki, NY, Mitsuda, K, Fujimoto, R, Furusho, T, Ohashi, T, Ishida, M, Sasaki, S, Ishisaki, Y, Tawara, Y & Furuzawa, A 2004, 'Searching for cosmic missing baryons with DIOS - Diffuse intergalactic oxygen surveyor', Journal of the Korean Physical Society, vol. 45, no. SUPPL..

Searching for cosmic missing baryons with DIOS - Diffuse intergalactic oxygen surveyor. / Suto, Yasushi; Yoshikawa, Kohji; Yamasaki, Noriko Y.; Mitsuda, Kazuhisa; Fujimoto, Ryuichi; Furusho, Tae; Ohashi, Takaya; Ishida, Manabu; Sasaki, Shin; Ishisaki, Yoshitaka; Tawara, Yuzuru; Furuzawa, Akihiro.

In: Journal of the Korean Physical Society, Vol. 45, No. SUPPL., 01.10.2004.

Research output: Contribution to journalArticle

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AU - Suto, Yasushi

AU - Yoshikawa, Kohji

AU - Yamasaki, Noriko Y.

AU - Mitsuda, Kazuhisa

AU - Fujimoto, Ryuichi

AU - Furusho, Tae

AU - Ohashi, Takaya

AU - Ishida, Manabu

AU - Sasaki, Shin

AU - Ishisaki, Yoshitaka

AU - Tawara, Yuzuru

AU - Furuzawa, Akihiro

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AB - Approximately 30 to 50 percent of the total baryons in the present universe is supposed to take the form of wa arm/hot intergalactic medium (WHIM) whose X-ray continuum emission is very weak. In order to carry out a direct and homogeneous survey of elusive cosmic missing baryons, we propose a dedicated soft-X-ray mission, DIOS (Diffuse Intergalactic Oxygen Surveyor). The unprecedented energy resolution (∼ 2eV) of the XSA (X-ray Spectrometer Array) on-board DIOS enables us to identify WHIM with gas temperatures T = 106-7K and overdensity δ= 10-100 located at z < 0.3 through emission lines of OVII and OVIII. DIOS, which will hopefully be launched in several years time, promises to open a new window of detection and characterization of cosmic missing baryons and to provide yet another important and complementary tool to trace the large-scale structure of the universe.

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Suto Y, Yoshikawa K, Yamasaki NY, Mitsuda K, Fujimoto R, Furusho T et al. Searching for cosmic missing baryons with DIOS - Diffuse intergalactic oxygen surveyor. Journal of the Korean Physical Society. 2004 Oct 1;45(SUPPL.).