| A Possible Origin of 6.7 GHz Linear Methanol Maser Sources |
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| 作者姓名： | Ye Xu |
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| 作者单位： | Ye Xu (Shanghai Astronomical Observatory，Chinese Academy of Sciences，Shanghai 200030) (Urumqi Astronomical Observatory，Chinese Academy of Sciences，Urumqi 830011) (National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012) E-mail |
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| 摘 要： | LETTERS1 INTRODUCTIONNew1y formed massive stars are obscured by dust, and their clearest signature is oftenat radio frequencies from strong maser emission. Methanol maser emission arises from severaItransitions, the strongest being the 5o -- 61A line at 6.7 GHz, which is also the second strongestGalactic masers of any molecule, first reported by Meaten (1991) and recognized as typical ofClass II masers. CIass II methanol masers are always found in regions of receat massive starfOr…
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| 关 键 词： | 天体微波激射源 星际物质 结构 倾斜度 |
A Possible Origin of 6.7 GHz Linear Methanol Maser Sources |
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| Ye Xu.A Possible Origin of 6.7 GHz Linear Methanol Maser Sources[J].Chinese Journal of Astronomy and Astrophysics,2001,1(5):389-394. |
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| Authors: | YeXu |
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| Institution: | ShanghaiAstronomicalObservatory,ChineseAcademyofSciences,Shanghai200030 |
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| Abstract: | We present a model which explains the observed multi-linear spatial structures with different velocity gradients of the 50-61A^ methanol line at 6.7GHz. We consider this and other hypotheses and conclude that the methanol maser emission probably comes from some thin rings variously inclined to the line of sight. |
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| Keywords: | masers - stars: circumstellar matter - stars: formation |
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