Time variability of five strong 12 GHz methanol masers
نویسندگان
چکیده
منابع مشابه
ATLASGAL — Environments of 6.7 GHz methanol masers
Using the 870-μm APEX Telescope Large Area Survey of the Galaxy (ATLASGAL), we have identified 577 submillimetre continuum sources with masers from the methanol multibeam (MMB) survey in the region 280 < l < 20; | b | < 1.5. 94 per cent of methanol masers in the region are associated with sub-millimetre dust emission. We estimate masses for ∼450 maser-associated sources and find that methanol m...
متن کاملA general catalogue of 6.7-GHz methanol masers⋆ I: data
Methanol masers are often detected in regions of intense star formation. Several studies in the last decade indicate that they may even be the earliest signpost of a high-mass star-forming region. Their powerful emission make them very good candidates for observations using both single–dish telescopes and interferometers, the latter allows detailed structural and dynamical studies of these obje...
متن کاملEVN observations of 6.7 GHz methanol masers from Medicina survey
We report VLBI observations of methanol masers in the brightest 51 − 60 A + transition at 6.7 GHz in NGC 281W, 18151−1208 and 19388+2357. Using the fringe rate method absolute positions were obtained for all observed sources. A linear ordered structure with a velocity gradient was revealed in NGC 281W. Under assumption that such structure is an edge-on Keplerian disk around the central object w...
متن کاملA general catalogue of 6.7-GHz methanol masers
Methanol masers are often detected in regions of intense star formation. Several studies in the last decade indicate that they may even be the earliest signpost of a high-mass star-forming region. Their powerful emission make them very good candidates for observations using both single-dish telescopes and interferometers, the latter allows detailed structural and dynamical studies of these obje...
متن کاملPolarization properties of 6.7 GHz methanol masers in NGC6334F
The Australia Telescope Compact Array (ATCA) has been used to make the first full polarization observations of 6.7 GHz methanol masers. Linear polarization was detected towards all four sources observed, at levels between a few and 10%, while none of the sources show circular polarization stronger than approximately 1.5%. Linear polarization appears to be more common in the 6.7 GHz methanol mas...
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics Supplement Series
سال: 1996
ISSN: 0365-0138,1286-4846
DOI: 10.1051/aas:1996110