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An Infrared Search for New Planetary Nebulae

Published online by Cambridge University Press:  19 July 2016

S. R. Pottasch ,
C. Esteban ,
A. Manchado  and
A. Mampaso
S. R. Pottasch
Affiliation:
Kapteyn Astron. Institute, Groningen, the Netherlands
C. Esteban
Affiliation:
Instituto de Astrofísica de Canarias, Tenerife, Spain
A. Manchado
Affiliation:
Instituto de Astrofísica de Canarias, Tenerife, Spain
A. Mampaso
Affiliation:
Instituto de Astrofísica de Canarias, Tenerife, Spain

Abstract

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We present the first results of a large scale infrared search for new planetary nebulae. More than 1000 unidentified sources were selected from the IRS PSC having infrared colours similar to those of known PN's. Subsequent near-infrared photometry and optical spectroscopy will be made to investigate their precise nature. We report here one to five microns photometry of 30 such sources obtained with the 1.5-m CSM telescope (Tenerife, Spain). The preliminary results indicate that many of the observed sources have near infrared colours of heavily reddened PN's (Av greater than 30 magnitudes in some cases), while a smaller fraction could represent obscured normal stars or giants surrounded by circumstellar envelopes.

Type
I. Observational Data on Nebulae
Information
Symposium - International Astronomical Union , Volume 131: Planetary Nebulae , 1989 , pp. 63 - 64
Copyright
Copyright © Kluwer 1989