Spatial structure of the class I methanol maser DR21(OH) at 44 GHz in 2003

Details Spatial structure of the class I methanol maser DR21(OH) at 44 GHz in 2003 Spatial structure of the class I methanol maser DR21(OH) at 44 GHz in 2003

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009arep...53..113p&link_type=abstract

Astronomy Reports, Volume 53, Issue 2, pp.113-125

Astronomy and Astrophysics

Astronomy

98.38.Er, 95.85.Bh

Scientific paper

We present the results of VLA observations of the class I methanol maser DR21(OH) at 44 GHz. The observations, retrieved from the NRAO archive (USA), were carried out in 2003. The maser has 18 spatial components, 17 of them confined to two clusters and one isolated component. In general, this spatial structure is similar to the structure observed earlier by other authors; the detected differences are too small to enable us to derive proper motions of the components: no proper motions exceeding the uncertainties were detecting during the 8 years since 1995. Amaser flare was observed in one of the spectral features for the first time. This is the first brightening detected for a class I methanol maser.

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