Free Access
Issue
Astron. Astrophys. Suppl. Ser.
Volume 120, Number 1, November_II 1996
Page(s) 111 - 126
DOI https://doi.org/10.1051/aas:1996278
Published online 15 November 1996
Optical observations of southern planetary nebula candidates DOI: 10.1051/aas:1996278

Astronomy and Astrophysics Supplement Series, Vol. 120, November II 1996, 111-126

Optical observations of southern planetary nebula candidates gif

G.C. Van de Steene, K.C. Sahu and S.R. Pottasch
Send offprint requests to: G.C. Van de Steene

European Southern Observatory, Casilla 19001, Santiago 19, Chile
STScI, 3700 San Martin Drive, Baltimore, MD 21218, U.S.A.
Kapteyn Astronomical Institute, P.O. Box 800, NL-9700 AV Groningen, The Netherlands

Received October 11, 1995; accepted April 11, 1996

Abstract:

We present H+[NII] images and low resolution spectra of 16 IRAS-selected, southern planetary nebula candidates previously detected in the radio continuum. The H+[NII] images are presented as finding charts. Contour plots are shown for the resolved planetary nebulae. From these images mean optical angular diameters were determined. Optical spectra show that these IRAS-selected and radio detected planetary nebula candidates are indeed planetary nebulae. The values for their extinction coefficient is generally very high. More than half of the planetary nebulae seem to be of low excitation, having central stars with an effective temperature of probably 60 000 K or less.

Key words: planetary nebulae: general


Copyright EDP Sciences
web@edpsciences.com

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.