Time variation of type I H2O masers. I - Long term flux density variation of the W 49N H2O maser
文献类型：期刊论文
| 作者 | Peng RS(彭瑞生)
|
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 1989-06 |
| 卷号 | 216期号:1-2页码:165-172 |
| 关键词 | interstellar medium: mocules - masers - interstellar medium: H II Regions W 49 N |
| ISSN号 | 0004-6361 |
| 产权排序 | 第一完成单位 |
| 英文摘要 | The flux density variations for five features in the W 49 N H2O maser occurring during the 1969-1978 period are explored. It is shown that the flux density variation of a maser cloudlet can be decomposed into a large amplitude variation and some frequent irregular fluctuations about a constant flux density level. In the second part, a model for describing the flux density variation of type I H2O masers in an ordinary physically quiet environment is proposed which is valid for a wide range of time scales (100 s to 10 to the 8th s). With a constant maser pumping rate, flux density variations can be attributed to the rotation of the whole maser, the possible spin of the maser cloudlets, or Kelvin-Helmholtz instability occurring on the surface of the cloudlet. |
| 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://adsabs.harvard.edu/abs/1989A%26A...216..165P |
| 语种 | 英语 |
| WOS记录号 | WOS:A1989AA10000019 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4082]  |
| 专题 | 云南天文台_其他 |
| 作者单位 | Yunnan Observatory, Academia Sinica, P.O. Box 110, Kunming, Yunnan, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Peng RS. Time variation of type I H2O masers. I - Long term flux density variation of the W 49N H2O maser[J]. ASTRONOMY & ASTROPHYSICS,1989,216(1-2):165-172. |
| APA | Peng RS.(1989).Time variation of type I H2O masers. I - Long term flux density variation of the W 49N H2O maser.ASTRONOMY & ASTROPHYSICS,216(1-2),165-172. |
| MLA | Peng RS."Time variation of type I H2O masers. I - Long term flux density variation of the W 49N H2O maser".ASTRONOMY & ASTROPHYSICS 216.1-2(1989):165-172. |
入库方式： OAI收割
来源：云南天文台
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