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

  • M. Peña (a1), W.-R. Hamann (a2) and M. T. Ruiz (a3)

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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).

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References

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

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