12.2 GHz survey towards 6.7 GHz methanol masers
نویسندگان
چکیده
منابع مشابه
Resolving distance ambiguities towards 6.7 GHz methanol masers
Context. Distances to most star forming regions are determined using kinematics, through the assumption that the observed radial velocity arises from the motion of the source with respect to the Sun resulting from the differential rotation of Galaxy. The primary challenge associated with the application of this technique in the inner Galaxy is the kinematic distance ambiguity. Aims. In this wor...
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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 کاملATLASGAL — 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 کاملThe mid-infrared environments of 6.7 GHz Methanol Masers from the Methanol Multi-Beam Survey
We present a study of the mid-infrared environments and association with star formation tracers of 6.7 GHz methanol masers taken from the Methanol Multi-Beam (MMB) Survey. Our ultimate goal is to establish the mass of the host star and its evolutionary stage for each maser site. As a first step, the GLIMPSE survey of the Galactic Plane is utilised to investigate the environment of 776 methanol ...
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...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2003
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20031451