Compact radio structure in the Seyfert nucleus of NGC 5929
文献类型：期刊论文
| 作者 | Su BM(苏步美); Muxlow, TWB; Pedlar, A; Holloway, AJ; Steffen, W; Kukula, MJ; Mutel, RL; Su BM(苏步美)
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 1996-04-15 |
| 卷号 | 279期号:4页码:1111-1119 |
| 关键词 | galaxies, individual, NGC 5329 galaxies, nuclei galaxies, Seyfert radio continuum, galaxies |
| ISSN号 | 0035-8711 |
| 产权排序 | 第三完成单位 |
| 通讯作者 | Su, BM |
| 英文摘要 | We present MERLIN and VLA radio measurements of the Seyfert galaxy NGC 5929 at 15, 8, 5, 1.6 and 0.4 GI-H. All measurements have subarcsecond angular resolution ranging from 0.6 arcsec at 0.4 GHz to 50 mas at 5 GHz, We confirm the triple structure reported in earlier studies. The weak central source of the triplet is almost certainly associated with the active nucleus. It has a flat spectral index and is unresolved even at 50-mas resolution, consistent with a synchrotron-self-absorbed core. The two components which straddle the core have sizes of order 10 pc and have steep spectral indices, and hence can be considered as small radio 'lobes'. Both of these components show evidence for low-frequency turnovers at 0.4 GHz, which we interpret as evidence for free-free absorption by ionized gas with an emission measure of similar to 10(5) pc cm(-6). As the north-eastern component shows greater free-free absorption than the south-western component, we propose that it is behind most of the narrow-line region (NLR) ionized gas, This implies that the nuclear collimated ejection is towards the observer in the south-west and away from the observer in the north-east.There is evidence of weak extended emission, particularly at 0.4 GHz, which may represent flows approximately perpendicular to the central triplet, We compare the radio structure of NGC 5929 to recent HST images and discuss the possible models to relate the radio and optical structures. |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | NARROW-LINE REGION ; GALAXY NGC-5929 ; EMISSION ; DRIVEN ; SCALE ; LOBES |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/279/4/1111 |
| 语种 | 英语 |
| WOS记录号 | WOS:A1996UG55300011 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4039]  |
| 专题 | 云南天文台_其他 |
| 推荐引用方式 GB/T 7714 | Su BM,Muxlow, TWB,Pedlar, A,et al. Compact radio structure in the Seyfert nucleus of NGC 5929[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,1996,279(4):1111-1119. |
| APA | 苏步美.,Muxlow, TWB.,Pedlar, A.,Holloway, AJ.,Steffen, W.,...&Su BM.(1996).Compact radio structure in the Seyfert nucleus of NGC 5929.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,279(4),1111-1119. |
| MLA | 苏步美,et al."Compact radio structure in the Seyfert nucleus of NGC 5929".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 279.4(1996):1111-1119. |
入库方式： OAI收割
来源：云南天文台
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