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A 3D view of the planetary nebula NGC 40

Published online by Cambridge University Press:  30 August 2012

Hektor Monteiro  and
Diego Falceta-Gonçalves
Hektor Monteiro
Affiliation:
Departamento de Física e Química, Universidade Federal de Itajubá email: [email protected]
Diego Falceta-Gonçalves
Affiliation:
Departamento de Física e Química, Universidade Federal de Itajubá email: [email protected]
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Abstract

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We present the results of a study of the planetary nebula NGC 40 with the use of the 3-D photoionization code Mocassin constrained by observational data of different types. The modeling process allows us to derive the three-dimensional nebular structure, physical and chemical characteristics and ionizing star parameters of the object by simultaneously fitting the integrated line intensities, the temperature map, density map, and the observed morphologies in different emission lines. For this particular case we combined hydrodynamical simulations with the photoionization scheme in order to obtain a self-consistent distribution of density and velocity of the nebular material. Finally, using theoretical evolutionary tracks of intermediate and low mass stars, we estimate the mass and age of the central star of NGC 40 as being 0.57 M⊙ and 5810 yr, respectively. The distance obtained from the fitting procedure was 1150 ± 170 pc.

Keywords

planetary nebulae: individual (NGC 40)methods: numerical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 446 - 447
Copyright
Copyright © International Astronomical Union 2012

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