Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ign..confe..36m&link_type=abstract
Ionized Gaseous Nebulae. Mexico City November 21- 24, 2000, meeting abstract
Astronomy and Astrophysics
Astronomy
Scientific paper
The determination of the tridimensional distribution of matter that produces the observed planetary nebulae (PNe) morphologies is essential in understanding the gas ejection mechanisms that form these objects, giving also important constraints for stellar evolution theories. Monteiro et al. (2000) showed that the ellipsoidal geometry, usually adopted in the literature, is not able of consistently reproducing the observations, specially the density profile, obtained through the ratio of the ion (S+) lines, and velocity profiles. It was also shown that a Diabolo structure was sucessfull in reproducing the general aspects of the observations and specially the density profile. In this work we analize in detail the spatial mass distribution and kinematics of NGC 3132, a typical anular PN, using the Diabolo structure and a tridimensional photoionization code. The results are compared with observations carried out in the Laboratório Nacional de Astrofísica (LNA) in which the object was maped with the goal of obtaining images and total intensities for various lines.
Gruenwald Ruth
Monteiro Hektor
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