High-resolution 86 GHz VLBA imaging of Sgr A
文献类型：期刊论文
| 作者 | Shen, ZQ; Lo, KY |
| 刊名 | PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT
 |
| 出版日期 | 2004 |
| 期号 | 155页码:413-414 |
| 英文摘要 | We present the first VLBI image of Sgr A* ever made at 86 GHz. The image shows an elliptical Gaussian brightness distribution with the same East-West elongation as seen at lower frequencies. The fitted apparent source structure is 0.21(-<0.01)(+0.02) mas by 0.13(->0.13)(+0.05) mas with a position angle of 79degrees(-33degrees)(+12degrees). The large error bar in the fitted minor axis size is mainly due to the poor spatial resolution along the North-South direction. The major axis size, however, is well determined. The discrepancy between the measured major axis size and that predicted by the current scattering angle of 0.175 mas at 86 GHz implies an intrinsic size along E-W of 0.116 mas, or, 0.93 AU at the distance of 8 kpc to the Galactic Center. |
| 关键词[WOS] | ASTERISK |
| 收录类别 | SCI ; ISTP |
| 语种 | 英语 |
| WOS记录号 | WOS:000225350800096 |
| 源URL | [http://119.78.226.72/handle/331011/18299]  |
| 专题 | 上海天文台_VLBI研究室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Natl Radio Astron Observ, Charlottesville, VA 22903 USA |
| 推荐引用方式 GB/T 7714 | Shen, ZQ,Lo, KY. High-resolution 86 GHz VLBA imaging of Sgr A[J]. PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT,2004(155):413-414. |
| APA | Shen, ZQ,&Lo, KY.(2004).High-resolution 86 GHz VLBA imaging of Sgr A.PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT(155),413-414. |
| MLA | Shen, ZQ,et al."High-resolution 86 GHz VLBA imaging of Sgr A".PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT .155(2004):413-414. |
入库方式： OAI收割
来源：上海天文台
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