A search for water masers associated with class II methanol masers – I. Longitude range 6°–20°
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چکیده
منابع مشابه
Class I methanol masers: Masers with EGOs
We have compared the results of a number of published class I methanol maser surveys with the catalogue of high-mass outflow candidates identified from the GLIMPSE survey (known as extended green objects or EGOs). We find class I methanol masers associated with approximately two-thirds of EGOs. Although the association between outflows and class I methanol masers has long been postulated on the...
متن کاملNew class I methanol masers
We review properties of all known collisionally pumped (class I) methanol maser series based on observations with the Australia Telescope Compact Array (ATCA) and the Mopra radio telescope. Masers at 36, 84, 44 and 95 GHz are most widespread, while 9.9, 25, 23.4 and 104 GHz masers are much rarer, tracing the most energetic shocks. A survey of many southern masers at 36 and 44 GHz suggests that ...
متن کاملSearch for class II methanol masers at 23 . 1 GHz
In the early days of methanol maser discoveries the 9 2 − 10 1 A + transition at 23.1 GHz was found to exhibit maser characteristics in the northern star-forming region W3(OH), and probable maser emission in two other sources. Attention subsequently turned to the 6.6-GHz 5 1 − 6 0 A + methanol maser transition, which has proved a valuable tracer of early high-mass star formation. We have undert...
متن کاملThe Relationship between Class I and Class II Methanol Masers
The Australia Telescope National Facility Mopra millimetre telescope has been used to search for 95.1-GHz class I methanol masers towards sixty-two 6.6-GHz class II methanol masers. A total of twenty-six 95.1-GHz masers were detected, eighteen of these being new discoveries. Combining the results of this search with observations reported in the literature, a near complete sample of sixty-six 6....
متن کاملPumping of Class II methanol masers
We present large velocity gradient (LVG) model calculations which explain the observed intensities (> 1012 K) of the 51−60 A+ methanol line at 6 GHz, which is the brightest of the strong Class II methanol masers. Our model of radiative transfer in the maser source was described in the first paper of this series devoted to the excitation of the 20−3−1 E transition at 12 GHz (Sobolev & Deguchi, 1...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2014
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stu1346