Proper motions of water vapour masers and bipolar outflow from NML Cygni | Zendy

A. M. S. Richards | Zendy; J. A. Yates | Zendy; R. J. Cohen | Zendy

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Proper motions of water vapour masers and bipolar outflow from NML Cygni

Author(s) -

A. M. S. Richards,

J. A. Yates,

R. J. Cohen

Publication year - 1996

Publication title -

monthly notices of the royal astronomical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.058

H-Index - 383

eISSN - 1365-8711

pISSN - 0035-8711

DOI - 10.1093/mnras/282.2.665

Subject(s) - maser , physics , astrophysics , bipolar outflow , supergiant , outflow , collimated light , astronomy , merlin (protein) , envelope (radar) , asymmetry , circumstellar envelope , star formation , stars , optics , meteorology , medicine , telecommunications , laser , radar , cancer , quantum mechanics , computer science , suppressor

MERLIN observations of the 22-GHz H2O masers in the circumstellar envelope of the supergiant NML Cyg show an irregular ring of emission 200 mas across, plus a pair of outlying features to the north-west (NW) and south-east (SE) nearly 600 mas apart. Comparison with maps at previous epochs reveals proper motions of these outlying features, of 1.9 ± 0.4 mas yr−1. This corresponds to a transverse vel...

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