A New Cluster of Galaxies Towards the Galactic Bulge, Suzaku J1759–3450
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<jats:title>Abstract</jats:title> <jats:p>We observed an extended X-ray source, designated as Suzaku J1759–3450, with Suzaku and Chandra observations towards 1RXS J175911.0–344921, which is an unidentified X-ray source listed in the ROSAT Bright Source Catalogue. A conspicuous emission line at 6 keV was also found in the Suzaku J1759–3450 spectrum. Assuming the emission line to be K emission from He-like Fe ions, we inferred Suzaku J1759–3450 to be an extragalactic object located at z = 0.13. The radial profile of the surface brightness in the 0.5–10 keV band was explained well with an isothermal β-model of $r_\textrm c=1{.^\prime}61$ and $\beta=0.78$. The X-ray spectrum was well reproduced by an opticallythin thermal plasma with the electron temperature of $kT_e = 5.3$ keV, attenuated by the photoelectric absorption of $N_\textrm H = 2.3 \times 10^{21} \textrm c\textrm m^{-2}$. The bolometric X-ray luminosity of $L_\textrm X(r < r_{500}) = 4.3 \times 10^{44} \textrm {erg} \textrm s^{-1}$ is consistent with that expected from the LX–T relation of clusters of galaxies. In terms of the spatial extent, the X-ray spectrum, and the bolometric luminosity of the X-ray emitting gas, we concluded that Suzaku J1759–3450 is a new cluster of galaxies.</jats:p>
収録刊行物
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- Publications of the Astronomical Society of Japan
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Publications of the Astronomical Society of Japan 65 (5), 102-, 2013
Tokyo : Astronomical Society of Japan
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詳細情報 詳細情報について
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- CRID
- 1523951029740766080
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- NII論文ID
- 40020043301
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- NII書誌ID
- AA1082896X
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- ISSN
- 00046264
- 2053051X
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- NDL書誌ID
- 025408182
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- 本文言語コード
- en
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- NDL 雑誌分類
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- ZM33(科学技術--宇宙科学)
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- データソース種別
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- NDL
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