| Chandra Observations of the Flat Spectrum Seyfert-2 Galaxies NGC 2110 and NGC 7582 |
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| 作者姓名： | Hui Dong Sui-Jian Xue Cheng Li and Fu-Zhen Cheng
Center for Astrophysics University of Science and Technology of China Hefei National Astronomical Observatories Chinese Academy of Sciences Beijing |
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| 作者单位： | Hui Dong，Sui-Jian Xue，Cheng Li and Fu-Zhen Cheng
1 Center for Astrophysics，University of Science and Technology of China，Hefei 230026; 2 National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012 |
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| 基金项目： | Supported by the National Natural Science Foundation of China. |
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| 摘 要： | Chandra observations of the Seyfert-2 galaxies NGC 2110 and NGC 7582 are presented. With the superb spatial resolution of Chandra we found that in NGC 7582 the soft (≤2 keV) and hard (2-10 keV) X-rays are emitted in different regions, consistent with the report by Xue et al. By comparing the present X-ray data with the previous infrared data, we determined that the soft X-ray region is the site of starburst activities. We found no significant temporal variations during our observations. We confirm the previous finding that NGC 2110 and NGC 7582 are flat-spectrum sources. We argue that the flat spectra may result from a cold absorbing material such as envisaged in the “dual absorbed” model. Strong Fe Kα emission feature is detected in 6-7keV. Its equivalent width is so large that it cannot be reproduced by using the Galactic column density of - 10^22 cm^-2.
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| 关 键 词： | X-射线 光谱 星系天文学 赛弗特星系 |
Chandra Observations of the Flat Spectrum Seyfert-2 Galaxies NGC 2110 and NGC 7582 |
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| Hui Dong,Sui-Jian Xue,Cheng Li and Fu-Zhen Cheng
Center for Astrophysics,University of Science and Technology of China,Hefei , National Astronomical Observatories,Chinese Academy of Sciences,Beijing .Chandra Observations of the Flat Spectrum Seyfert-2 Galaxies NGC 2110 and NGC 7582[J].Chinese Journal of Astronomy and Astrophysics,2004,4(5):427-439. |
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| Authors: | HuiDong Sui-JianXue ChengLi Fu-ZhenCheng |
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| Institution: | [1]CenterforAstrophysics,UniversityofScienceandTechnologyofChina,Hefei230026 [2]NationalAstronomicalObservatories,ChineseAcademyofSciences,Beijing100012 |
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| Abstract: | |
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| Keywords: | X-rays: image - X-ray: spectrum - Galaxy: Seyfert - Galaxy: individuals: NGC 7582 and NGC 2110 |
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