K 4-47 is an unusual planetary nebula (PN) composed of a compact high-ionization core and a pair of low-ionization knots. Long-slit medium-resolution spectra of...

A comprehensive study of the planetary nebula K4-55 is presented. In addition to CCD narrowband images, spatially resolved low-dispersion and high-resolution...

Context. The kinematics of planetary nebulae in external galaxies and in our own is a clue for understanding the behavior of the low- and intermediate-mass...

We present the kinematics of a sample of bipolar planetary nebulae (PNs) which cover a wide range of observed morphologies and collimation degrees, from bipolar...

It is found that the planetary nebula M1-32, which has a [WC4-5] core, shows a peculiar kinematics with bipolar outflows reaching ±200 km/s, while the main body...

We present images and high-resolution spectra of the planetary nebulae IC 2553 and NGC 5882. Spatiokinematic modeling of the nebulae shows that they are...

Close binary evolution is widely invoked to explain the formation of axisymmetric planetary nebulae, after a brief common envelope phase. The evolution of the...

We present preliminary results of VLT spectroscopy follow-up of Planetary Nebulae (PNe) and HII regions in the dwarf Irregular galaxy NGC 3109. In total we have...

We obtained optical long-slit spectra of four planetary nebulae (PNe) with low-ionization pair of knots, namely He 1-1, IC 2149, KjPn 8 and NGC 7662. These data...