Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...136..200s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 136, no. 2, July 1984, p. 200-205. Research supported by the Consiglio Naziona
Astronomy and Astrophysics
Astrophysics
16
Astronomical Spectroscopy, H Beta Line, Planetary Nebulae, Stellar Motions, Astronomical Models, Gas Dynamics, Spectral Line Width, Stellar Evolution
Scientific paper
High dispersion spectra allowed the authors to obtain the expansion velocity, Hβ flux and angular dimension of fourteen planetary nebulae. All the nebulae of this sample are in a rather early evolutionary phase (nebular radius <0.07 pc) and present expansion velocities smaller than 15 km s-1. The observational parameters, i.e. nebular radius, expansion velocity, nebular mass, temperature, radius and luminosity of the central star (for two objects) can be explained in terms of the "two-phase" evolutionary model suggested by Sabbadin et al. (1984).
Bianchini Antonio
Hamzaoglu E.
Sabbadin Franco
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