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The 3-D ionization structure of the planetary nebula NGC6565 by Turatto, M.; Cappellaro, E.; Ragazzoni, R.; Benetti, S.; Sabbadin, F. is a scholarly article available to read on EtoBox.

What is The 3-D ionization structure of the planetary nebula NGC6565 about?

A detailed study of the planetary nebula NGC6565 has been carried out on long-slit echellograms at six, equally spaced position angles. The expansion velocity field, the c(Hbeta) distribution and the radial profile of the physical conditions (electron temperature and density) are obtained. The distance, radius, mass and filling factor of the nebula and the temperature and luminosity of the central star are derived. The radial ionization structure is analyzed using both the classical method and the photo-ionization code CLOUDY. Moreover, we present the spatial structure in a series of images from different directions. NGC6565 is a young (2000--2500 years), patchy, optically thick triaxial ellipsoid projected almost pole-on. The matter close to major axis was swept-up by some accelerating agent forming two faint and asymmetric polar cups. A large cocoon of almost neutral gas completely embeds the ionized nebula. NGC6565 is in a recombination phase. The stellar decline started about 1000 years ago, but the main nebula remained optically thin for other 600 years before the recombination phase occurred. In the near future the ionization front will re-grow, since the dilution factor due

Author

Turatto, M.; Cappellaro, E.; Ragazzoni, R.; Benetti, S.; Sabbadin, F.

Published

2002

Language

EN