Investigating the kinematics of the faint, giant haloes of Planetary Nebulae

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Kinematics, Planetary Nebulae, Stellar Envelopes, Stellar Evolution, Stellar Spectra, Astronomical Spectroscopy, Emission Spectra, Line Spectra, Stellar Models

Scientific paper

Some interesting results from a current program of high resolution spectroscopy of the faint, giant haloes of Planetary Nebulae are presented. Observations of optical emission line profiles show that these haloes have very little turbulent motion. The halo of NGC 6543 is thought to be a filamentary, thin, radially expanding, spherical shell and that of NGC 6826 is more probably a filled spherical shell. The halo of NGC 6720 contains inner and outer shells, the split profiles from the inner halo show that this part of the halo is bipolar in nature.

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