Searching for cosmic missing baryons with DIOS -- Diffuse Intergalactic Oxygen Surveyor --

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dc.creatorSuto, Yasushi
dc.creatorYoshikawa, Kohji
dc.creatorYamasaki, Noriko Y.
dc.creatorMitsuda, Kazuhisa
dc.creatorFujimoto, Ryuichi
dc.creatorFurusho, Tae
dc.creatorOhashi, Takaya
dc.creatorIshida, Manabu
dc.creatorSasaki, Shin
dc.creatorIshisaki, Yoshitaka
dc.creatorTawara, Yuzuru
dc.creatorFuruzawa, Akihiro
dc.date2004-02-17
dc.date.accessioned2026-07-07T02:12:19Z
dc.date.available2026-07-07T02:12:19Z
dc.descriptionApproximately 30 to 50 percent of the total baryons in the present universe is supposed to take a form of warm/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, {\it DIOS} (Diffuse Intergalactic Oxygen Surveyor). The unprecedented energy resolution ($\sim 2$eV) of the XSA (X-ray Spectrometer Array) on-board {\it DIOS} enables us to identify WHIM with gas temperature $T=10^{6-7}$K and overdensity $δ=10-100$ located at $z<0.3$ through emission lines of O{\sc vii} and O{\sc viii}. {\it DIOS}, hopefully launched in several years, 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.
dc.description8 pages, 10 figures, invited talk at the VI International Conference on Gravitation and Astrophysics of Asian-Pacfic Countries, to be published in the proceedings
dc.identifierhttps://arxiv.org/abs/astro-ph/0402389
dc.identifierhttp://arxiv.org/abs/astro-ph/0402389
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7413
dc.subjectAstrophysics
dc.titleSearching for cosmic missing baryons with DIOS -- Diffuse Intergalactic Oxygen Surveyor --
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