| タイトル | X-ray study of NGC 1399 in the Fornax cluster of galaxies |
| 著者（英） | Makishima, K.; Kondo, H.; Hatsukade, I.; Kim, D.-W.; Yamashita, K.; Trinchieri, G.; Ohashi, T.; Tsuru, T.; Ikebe, Y.; Fabbiano, G. |
| 著者所属（英） | Harvard-Smithsonian Center for Astrophysics|Tokyo Univ.|Osservatorio Astrofisico di Arcetri|Tokyo Univ.|Miyazaki Univ. |
| 発行日 | 1992-01-01 |
| 言語 | eng |
| 内容記述 | Observations of the cD galaxy NGC 1399 in the Fornax cluster of galaxies with Ginga have detected extended X-ray emission out to a radius of more than about 360 kpc. The energy spectrum of this emission is well fitted with an optically thin thermal spectrum with kT = 1.46 +0.05/-0.21 keV with a strong iron emission line corresponding to an iron abundance of 1.1 +1.3/-0.5 times solar. The mass of the hot gas responsible for X-ray emission is nearly the same as the total stellar mass of the cluster. Therefore the presence of iron at near-solar abundance suggests that the mass of the hot gas ejected from galaxies is comparable to the total stellar mass. This result indicates that most of the hot gas in a very poor cluster is created through ejections from galaxies, rather than being primordial. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 92A19338 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/330331 |
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