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SUZAKU OBSERVATIONS OF SUBHALOS IN THE COMA CLUSTER
https://hiroshima.repo.nii.ac.jp/records/2008898
https://hiroshima.repo.nii.ac.jp/records/200889839c4f8b1-8b01-447f-982a-dc30097cf426
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
ApJ_806_123.pdf (2.1 MB)
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| Item type | デフォルトアイテムタイプ_（フル）(1) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-03-18 | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | SUZAKU OBSERVATIONS OF SUBHALOS IN THE COMA CLUSTER | |||||||||||||
| 言語 | en | |||||||||||||
| 作成者 |
Sasaki, Toru
× Sasaki, Toru
× Matsushita, Kyoko
× Sato, Kosuke
× Okabe, Nobuhiro
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| アクセス権 | ||||||||||||||
| アクセス権 | open access | |||||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||||||
| 権利情報 | ||||||||||||||
| 権利情報 | © 2015. The American Astronomical Society. All rights reserved. | |||||||||||||
| 主題 | ||||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | galaxies: clusters: individual (Coma Cluster) – X-rays: galaxies: clusters | |||||||||||||
| 主題 | ||||||||||||||
| 主題Scheme | NDC | |||||||||||||
| 主題 | 440 | |||||||||||||
| 内容記述 | ||||||||||||||
| 内容記述 | We observed three massive subhalos in the Coma cluster with Suzaku. These subhalos, labeled “ID 1," “ID 2," and “ID 32," were detected with a weak-lensing survey using Subaru/Suprime-Cam, and are located at the projected distances of 1.4 r_500, 1.2 r_500, and 1.6 r_500 from the center of the Coma cluster, respectively. The subhalo “ID 1" has a compact X-ray excess emission close to the center of the weak-lensing mass contour, and the gas mass to weak-lensing mass ratio is about 0.001. The temperature of the emission is about 3 keV, which is slightly lower than that of the surrounding intracluster medium (ICM) and that expected for the temperature versus mass relation of clusters of galaxies. The subhalo “ID 32" shows an excess emission whose peak is shifted toward the opposite direction from the center of the Coma cluster. The gas mass to weak-lensing mass ratio is also about 0.001, which is significantly smaller than regular galaxy groups. The temperature of the excess is about 0.5 keV and significantly lower than that of the surrounding ICM and far from the temperature versus mass relation of clusters. However, there is no significant excess X-ray emission in the “ID 2" subhalo. Assuming an infall velocity of about 2000 km s^−1, at the border of the excess X-ray emission, the ram pressures for “ID 1" and “ID 32" are comparable to the gravitational restoring force per area. We also studied the effect of the Kelvin–Helmholtz instability to strip the gas. Although we found X-ray clumps associated with the weak-lensing subhalos, their X-ray luminosities are much lower than the total ICM luminosity in the cluster outskirts. | |||||||||||||
| 言語 | en | |||||||||||||
| 内容記述 | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | We acknowledge the support of a Grant-in-Aid for Scientific Research from the MEXT, No. 25400235 (K.M.), 25800112 (K.S.), and 26800097 (N.O.). This work was supported by “World Premier International Research Center Initiative (WPI Initiative)" and the Funds for the Development of Human Resources in Science and Technology under MEXT, Japan. | |||||||||||||
| 出版者 | ||||||||||||||
| 出版者 | IOP Publishing | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| 資源タイプ | ||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||
| 資源タイプ | journal article | |||||||||||||
| 出版タイプ | ||||||||||||||
| 出版タイプ | VoR | |||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||||
| 関連情報 | ||||||||||||||
| 識別子タイプ | DOI | |||||||||||||
| 関連識別子 | 10.1088/0004-637X/806/1/123 | |||||||||||||
| 関連情報 | ||||||||||||||
| 識別子タイプ | DOI | |||||||||||||
| 関連識別子 | https://doi.org/10.1088/0004-637X/806/1/123 | |||||||||||||
| 収録物識別子 | ||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||
| 収録物識別子 | 0004-637X | |||||||||||||
| 収録物識別子 | ||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||
| 収録物識別子 | 1538-4357 | |||||||||||||
| 収録物識別子 | ||||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||||
| 収録物識別子 | AA00553253 | |||||||||||||
| 開始ページ | ||||||||||||||
| 開始ページ | 123 | |||||||||||||
| 書誌情報 |
The Astrophysical Journal The Astrophysical Journal 巻 806, 号 1, p. 123, 発行日 2015-06-10 |
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| 旧ID | 47046 | |||||||||||||
