12.2 GHz survey towards 6.7 GHz methanol masers - A comparison of 12.2 GHz and 6.7 GHz spectra

被引：35

作者：

Blaszkiewicz, L ^{[1
]}

Kus, AJ ^{[1
]}

机构：

[1] Nicholas Copernicus Univ, Torun Ctr Astron, PL-87100 Torun, Poland

来源：

ASTRONOMY & ASTROPHYSICS | 2004年 / 413卷 / 01期

关键词：

masers; surveys; stars : formation; ISM : molecules; radio lines : ISM; ISM : HII regions;

D O I：

10.1051/0004-6361:20031451

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results of a 12.2 GHz methanol maser survey done with the Torun 32 m radio telescope. We examined 261 star forming-sites, known as containing 6.7 GHz maser emission sources. The survey resulted in 49 sources with maser line detection, with 21 previously unknown emissions. All detected 12.2 GHz masers have been observed at the 6.7 GHz transition. Only one 12.2 GHz source had no 6.7 GHz counterpart. We compared basic spectral line properties at both transitions. In a few cases we observed absorption features and emitting counterparts in the other monitored frequency, at the same velocity.

引用

页码：233 / 240

页数：8

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