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The LMC Planetary Nebula N66 Revisited: Nebular Kinematics and Stellar Models

Published online by Cambridge University Press:  26 May 2016

M. Peña ,
W.-R. Hamann  and
M. T. Ruiz
M. Peña
Affiliation:
Instituto de Astronomia, UNAM, Mexico
W.-R. Hamann
Affiliation:
Lehrstuhl Astrophysik der Universität Potsdam, Germany
M. T. Ruiz
Affiliation:
Depto. de Astronomía, Universidad de Chile, Chile

Extract

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LMC-N66 is an extraordinary planetary nebula whose central star underwent a violent mass loss event which has lasted for 10 years. The outburst reached its maximum in 1994. Since then the star has been slowly fading. During the stellar outburst, the nebular lines have shown no changes.

The nebula shows a complex morphology. Two very bright lobes at both sides of the central star, almost aligned in the E-W direction, constitute the main body of the nebula. Several knots and filaments are conspicuous over the surface lying preferentially on the S-E and N-W directions. A couple of faint, extended loops are also detected in the S-E and N-W directions at both sides of the star. The extension of these loops are larger than 0.5 pc at the LMC distance. A no emitting-zone in the S-W quadrant, seems to be part of a dusty toroid around the central star, although the central star is not obscured by such a dark material (see Blades et ale 1992 for a description of N66 morphology).

Type
Part VIII: Planetary Nebulae as Galaxy Probes
Information
Symposium - International Astronomical Union , Volume 209: Planetary Nebulae: Their Evolution and Role in the Universe , 2003 , pp. 579 - 580
Copyright
Copyright © Astronomical Society of the Pacific 2003 

References

Blades, J. C., et al., 1992, ApJ, 398, L41 CrossRefGoogle Scholar
Hamann, W.-R., IAU Symp. 209, these proceedings Google Scholar
Peña, M., Hamann, W.-R., Koesterke, L., Maza, J., Méndez, R., Peimbert, M., Ruiz, M.T., & Torres-Peimbert, S., 1997, ApJ, 491, 233 CrossRefGoogle Scholar