Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-06-16
Astronomy and Astrophysics
Astrophysics
4 pages, 4 figures, accepted MNRAS 1998 June 11
Scientific paper
10.1046/j.1365-8711.1998.01900.x
The design and first use of the Manchester occulting mask imager (MOMI) is described. This device, when combined with the Cassegrain or Ritchey-Chretien foci of large telescopes, is dedicated to the imagery of faint line emission regions around bright central sources. Initial observations, with MOMI on the Nordic Optical telescope (NOT), of the V=4.8 mag P~Cygni environment, have revealed a $\geq$~5~arcmin long [NII] 6584A emitting filament projecting from the outer nebular shell of this luminous blue variable (LBV) star. The presence of a mono-polar lobe older than both the inner (22 arcsec diameter) and outer (1.6 arcmin diameter) shells is suggested.
Bryce Myfanwy
Meaburn John
O'Connor Anthony J.
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