Statistical properties of 6.7 GHz methanol maser sources
文献类型：期刊论文
| 作者 | Xu, Y ; Zheng, XW; Jiang, DR
|
| 刊名 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2003-02-01 |
| 卷号 | 3期号:1页码:49-68 |
| 关键词 | masers ISM : molecules stars : circurnstellar matter stars : formation ISM : HII regions |
| 英文摘要 | We present a statistical analysis of 482 6.7 GHz methanol maser sources from the available literature, on their maser emission and the characteristics of their associated infrared sources. On the color-color diagram, more than 70% of the objects fall within a very small region (0.57 less than or equal to [25 - 12] less than or equal to 1.30 and 1.30 less than or equal to [60 - 12] less than or equal to 2.50). This suggests that 6.7 GHz methanol maser emission occurs only within a very short evolutionary phase during the earliest stage of star formation. The velocity ranges of the masers belong to two main groups: one from 1 to 10 km s(-1), and one from about 11 to 20 km s(-1). These velocity ranges indicate that the masers are probably associated with both disks and outflows. The correlations between the maser and infrared flux densities, and between the maser and infrared luminosities, suggest that far-infrared radiation is a possible pumping mechanism for the masers which most probably originate from some outer molecular envelopes or disks. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STAR-FORMING REGIONS ; ULTRACOMPACT HII-REGIONS ; IRAS-SELECTED SOURCES ; H-II REGIONS ; MOLECULAR CLOUDS ; 5(1)-6(0)A+-METHANOL MASERS ; VLBI OBSERVATIONS ; SOLAR CIRCLE ; MILKY-WAY ; SEARCH |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000181239600005 |
| 源URL | [http://119.78.226.72/handle/331011/18287]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Y,Zheng, XW,Jiang, DR. Statistical properties of 6.7 GHz methanol maser sources[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2003,3(1):49-68. |
| APA | Xu, Y,Zheng, XW,&Jiang, DR.(2003).Statistical properties of 6.7 GHz methanol maser sources.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,3(1),49-68. |
| MLA | Xu, Y,et al."Statistical properties of 6.7 GHz methanol maser sources".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 3.1(2003):49-68. |
入库方式： OAI收割
来源：上海天文台
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