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Astron. Astrophys. 318, 561-564 (1997)

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1. Introduction

The use of morphological criteria has been a popular approach to studying and classifying planetary nebulae (PNe) for decades (Curtis 1918; Perek & Kohoutek 1967). Only recently, narrow-band CCD imaging surveys (Balick 1987; Schwarz et al. 1992) with their unprecedented sensitivity and - more important - dynamical range have provided us with the amount of data necessary to investigate the morphology of a statistically relevant number of PNe. As a logical consequence new morphological classification schemes based on such surveys have been proposed (Balick 1987; Schwarz et al. 1993). The two objects presented here are bipolar PNe according to all these schemes. For a recent comparative study of bipolar PNe see Corradi & Schwarz (1995). Among bipolar PNe many peculiar, unique objects exist which cannot easily be fit into a unified scenario. Therefore every additional object of this class is of importance. Visual inspection of the POSS and ESO/SERC surveys continue to provide new discoveries of PNe (e.g. Kerber et al. 1996; Tamura & Weinberger 1995) despite the fact that this has been done for almost 40 years, now. Both objects discussed here are very recent additions to the sample of galactic PNe. Wei 1-5 ([FORMULA] = [FORMULA] [FORMULA] [FORMULA], [FORMULA] = - [FORMULA] [FORMULA] [FORMULA], 2000.0) was recently reported as a possible new PN by Weinberger (1995). KeWe 1 ([FORMULA] = [FORMULA] [FORMULA] [FORMULA], [FORMULA] = - [FORMULA] [FORMULA] [FORMULA], 2000.0) was classified as a "nebula of unknown nature" by Brand et al. (1986). It was recognized as a possible PN by Kerber & Weinberger (1995). New narrow-band images presented in this article enable us to confirm the nature of these objects as PNe and to discuss these nebulae and their morphology on a more solid basis.

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© European Southern Observatory (ESO) 1997

Online publication: July 8, 1998