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Kn 26: a textbook case hourglass planetary nebula with a twist

Published online by Cambridge University Press:  30 August 2012

Martín A. Guerrero ,
Roberto Vázquez ,
Luis F. Miranda  and
Gerardo Ramos-Larios
Martín A. Guerrero
Affiliation:
Instituto de Astrofísica de Andalucía, IAA-CSIC, Spain email: mar@iaa.es
Roberto Vázquez
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, Mexico email: vazquez@astro.unam.mx
Luis F. Miranda
Affiliation:
Departamento de Fisica Aplicada, Universidade de Vigo, Vigo, Spain Consejo Superior de Investigaciones Científicas, Madrid, Spain email: lfm@iaa.es
Gerardo Ramos-Larios
Affiliation:
Instituto de Astronomía y Meteorología, Jalisco, Mexico email: gerardo@astro.iam.udg.mx
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Abstract

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Kn 26 is a recently identified planetary nebula (PN). To confirm its nature and study its spatio-kinematical structure, we have obtained high spatial-resolution optical and near-IR narrowband images, high-dispersion long-slit echelle spectra, and intermediate-resolution spectroscopic observations. The new data confirm the PN nature of Kn 26 and reveal features typical of bipolar PNe: hourglass morphology, H2 emission, and nitrogen enrichment. A detailed analysis of its morphology and kinematics, however, suggests the presence of one additional pair of bipolar lobes that would make Kn 26 a new member of the class of quadrupolar PNe.

Keywords

planetary nebulae: individual (Kn 26)infrared: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 376 - 377
Copyright
Copyright © International Astronomical Union 2012

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