New ammonia masers towards NGC6334I

Details New ammonia masers towards NGC6334I New ammonia masers towards NGC6334I

2007-11-12

arxiv.org/abs/0711.1704v1

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1111/j.1745-3933.2007.00384.x

We report the detection of new ammonia masers in the non-metastable (8,6) and (11,9) transitions towards the massive star forming region NGC6334I. Observations were made with the ATCA interferometer and the emitting region appears unresolved in the 2.7" x 0.8" beam, with deconvolved sizes less than an arcsecond. We estimate peak brightness temperatures of 7.8 x 10^5 and 1.2 x 10^5 K for the (8,6) and (11,9) transitions, respectively. The masers appear coincident both spatially and in velocity with a previously detected ammonia (6,6) maser. We also suggest that emission in the (10,9), (9,9) and (7,6) transitions may also be masers, based on their narrow line widths and overlapping velocity ranges with the above masers, as observed with the single-dish Mopra radiotelescope.

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