Up: Narrow-band imaging and a nebulae
He2-437 is a PN which was verified by
Henize (1967).
His interpretation of
the Palomar Atlas images was "a bright star between teardrop-shaped fans of
nebulosity''. On our images we see a bipolar nebular with a smaller but
brighter circular nebula in the middle (Fig.7). From the images it appears
that the excitation in the middle part of the nebula is higher.
![\begin{figure}
\includegraphics [width=8.8cm]{8208fig7.eps}\end{figure}](/articles/aas/full/1999/06/ds8208/Timg31.gif) |
Figure 7:
He2-437. This PN is highly bipolar. The inner nebula appears much brighter
than the outer "fans'' in [O III]  5007Å which indicates
different nebula properties. This deserves a detailed spectroscopic
analysis |
We have taken low-resolution spectra which verify the nebular origin of the
emission. The shape of He2-437 reminds of a napkin with a ring.
Up: Narrow-band imaging and a nebulae
Copyright The European Southern Observatory (ESO)
![\begin{figure}
\includegraphics [width=8.8cm]{8208fig7.eps}\end{figure}](/articles/aas/full/1999/06/ds8208/img31.gif)