Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...429l..85h&link_type=abstract
The Astrophysical Journal, vol. 429, no. 2, pt. 2, p. L85-L88
Astronomy and Astrophysics
Astrophysics
33
Ammonia, H Ii Regions, Maser Outputs, Star Formation, Thermal Emission, High Resolution, Interferometry, Very Large Array (Vla)
Scientific paper
We present interferometric observations of the NH3(5,5) inversion line toward the H 2 region complex G9.62+0.19 which confirm the discovery of maser action in this transition. At the present time G9.62+0.19 is the only known source where this maser occurs. The maser is unresolved; an upper limit to its size is 0 sec .5 corresponding to a lower limit on the brightness temperature of 104 K. The NH3(5,5) maser is coincident with a weak continuum source and a water maser. Emission from thermal ammonia consisting of two clumps is detected approximately equals 8 sec south of the maser position. The thermal ammonia clumps are elongated toward the position of the NH3(5,5) maser and form part of a linear structure of length approximately equals 0.6 pc, outlined by maser emission in several molecular lines, highly excited ammonia and ultracompact H 2 regions.
Cesaroni Riccardo
Churchwell Edward
Hofner Peter
Kurtz Stan
Walmsley Charles Malcolm
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