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| Paper: |
The Dramatic Hypersonic Knotty Outflow from MyCn 18 |
| Volume: |
199, Asymmetrical Planetary Nebulae II: From Origins to Microstructures |
| Page: |
409 |
| Authors: |
Redman, M. P.; O'Connor, J. A.; Holloway, A. J.; Bryce, M.; López, J. A.; Meaburn, J. |
| Abstract: |
We report the results of a complete spatio-kinematical study of the hypersonic knots and bright core of the Engraved Hourglass planetary nebula, MyCn18, using the Manchester echelle spectrometer combined with 3.9m Anglo-Australian telescope. A continuum subtracted image reveals the knots to be confined to within �''of the bipolar axis of the nebula. The relative radial velocity of the knots versus their apparent angular distance from the star is plotted for this complete sample. A nova-like explosive event in the core of MyCn18 is suggested as a possible mechanism for generating these remarkable knots. |
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