High-velocity bipolar mass flow in the planetary nebula NGC 2392

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astronomical Spectroscopy, Planetary Nebulae, Stellar Mass Ejection, Bipolarity, Fabry-Perot Interferometers, H Alpha Line, Symbiotic Stars

Scientific paper

Detailed spectroscopic observations of a high-velocity component in the velocity field of the "Eskimo" nebula, NGC 2392, are presented. It is interpreted as a jetlike multiknot bipolar mass flow with a velocity of nearly 200 km s-1 and a small angle of collimation less than 10°. Electron density, mass, kinetic energy, and power are estimated.

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