منابع مشابه
A search for 85.5- and 86.6-GHz methanol maser emission
We have used the Australia Telescope National Facility Mopra 22m millimetre telescope to search for emission from the 6 −2-7−1 E (85.5-GHz) and 72-63 A − (86.6GHz) transitions of methanol. The search was targeted towards 22 star formation regions which exhibit maser emission in the 107.0-GHz 31-40 A + methanol transition, as well as in the 6.6-GHz 51-60 A + transition characteristic of class II...
متن کاملThe 6 - GHz methanol multibeam maser catalogue II : Galactic longitudes 6 ◦ to 20 ◦
We present the second portion of an unbiased survey of the Galactic plane for 6668MHz methanol masers. This section of the survey spans the longitude range 6◦ to 20◦. We report the detection of 119 maser sources, of which 42 are new discoveries. The masers are tightly constrained to the Galactic plane, with only four outside a latitude range of ±1◦. This longitude region includes the brightest ...
متن کاملVLBA imaging of a periodic 12.2 GHz methanol maser flare in G9.62+0.20E
The class II methanol maser source G9.62+0.20E undergoes periodic flares at both 6.7 and 12.2 GHz. The flare starting in 2001 October was observed at seven epochs over three months using the VLBA at 12.2 GHz. High angular resolution images (beam size ∼ 1.7 x 0.6 mas) were obtained, enabling us to observe changes in 16 individual maser components. It was found that while existing maser spots inc...
متن کاملThe 6 - GHz methanol multibeam maser catalogue I : Galactic Centre region , longitudes 345 ◦ to 6 ◦
We have conducted a Galactic plane survey of methanol masers at 6668 MHz using a 7-beam receiver on the Parkes telescope. Here we present results from the first part, which provides sensitive unbiased coverage of a large region around the Galactic Centre. Details are given for 183 methanol maser sites in the longitude range 345◦ through the Galactic Centre to 6◦. Within 6◦ of the Centre, we fou...
متن کاملRing shaped 6.7 GHz methanol maser emission around a young high-mass star
We report on EVN imaging of the 6.7 GHz methanol maser emission from the candidate high-mass protostar G23.657-0.127. The masers originate in a nearly circular ring of 127 mas radius and 12 mas width. The ring structure points at a central exciting object which characteristics are typical for a young massive star; its bolometric luminosity is estimated to be ≤ 3.2 × 104L⊙ and ≤ 1.2 × 10 5L⊙ for...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2012
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921312006795