Morphokinematic structure of the Planetary Nebula NGC 6563

Abstract

We present a morphokinematic analysis based on high-resolution long-slit echelle spectroscopy of the \nii$\lambda 6583$ line and narrowband imaging. Position-velocity diagrams reveal asymmetric expansion and localized kinematic features. We derive a systemic velocity of $V_{\mathrm{sys}}^{\mathrm{LSR}}=-25\pm 1$\kms\ ($V_{\mathrm{sys}}^{\mathrm{HEL}}=-34\pm 1$\kms) and a main shell expansion velocity of $V_{\exp }=22\pm 1$\kms. Three-dimensional modeling indicates an ellipsoidal main body surrounded by a thin shell, two ear-like protrusions, and additional small-scale structures. The corresponding kinematic ages are $3600\pm 700$ yr for the ellipsoid and ring, and $7500\pm 1000$ yr and $8800\pm 1500$ yr for the two opposite ear-like protrusions, respectively, indicating that these outer structures predate the main nebular envelope. The kinematic asymmetry and enhanced emission regions suggest evolution within a non-uniform ambient medium. At the same time, the presence of collimated ear-like structures is consistent with shaping influenced by binary interaction, where earlier outflows preceded the ejection of the dense shell. NGC\,6563 therefore appears to be a dynamically evolved system shaped by the combined effects of episodic mass ejection and environmental interaction.

17 pages, 7 figures, published in the journal Galaxies (https://www.mdpi.com/2075-4434/14/3/60)

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