Radio spectra of several ultraluminous IRAS galaxies
文献类型：期刊论文
| 作者 | Su BM(苏步美); Li YS(李永生); Gao YF(高亦菲); Fu HW(符好文) |
| 刊名 | CHINESE ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2002-04 |
| 卷号 | 26期号:2页码:158-163 |
| 关键词 | IRAS galaxies radio spectrum |
| ISSN号 | 0275-1062 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Su, BM (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | A sample of IRAS galaxies with infrared luminosities as high as 10(11.8) to 10(12.8) L-. were observed using the Australia Telescope Compact Array (ATCA) at 8.6, 4.8, 2.4 and 1.4 GHz. 4 galaxies in the sample are found to have steep spectra at high frequency and their flux densities decrease at low frequency, showing a peak-like spectral pattern with the peak flux at several GHz. Two possible mechanisms, synchrotron self-absorption and free-free absorption, for the turning-over in the low-frequency side are discussed. From the analysis of the spectra of the IRAS sources, 00199-7426, 02587-6336, 07020-5423 and 21547-5823, we conclude that free-free absorption may be the cause for the low-frequency turnover. By model fitting to the observations several physical parameters of the sources are obtained. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 收录类别 | SCI |
| 原文出处 | http://www.sciencedirect.com/science/article/pii/S027510620200053X |
| 语种 | 英语 |
| WOS记录号 | WOS:000176345300004 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4141]  |
| 专题 | 云南天文台_其他 |
| 作者单位 | Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China |
| 推荐引用方式 GB/T 7714 | Su BM,Li YS,Gao YF,et al. Radio spectra of several ultraluminous IRAS galaxies[J]. CHINESE ASTRONOMY AND ASTROPHYSICS,2002,26(2):158-163. |
| APA | Su BM,Li YS,Gao YF,&Fu HW.(2002).Radio spectra of several ultraluminous IRAS galaxies.CHINESE ASTRONOMY AND ASTROPHYSICS,26(2),158-163. |
| MLA | Su BM,et al."Radio spectra of several ultraluminous IRAS galaxies".CHINESE ASTRONOMY AND ASTROPHYSICS 26.2(2002):158-163. |
入库方式： OAI收割
来源：云南天文台
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