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Temperature Fluctuations in PN

Published online by Cambridge University Press:  07 August 2017

Ruth Gruenwald  and
Sueli M. Viegas
Ruth Gruenwald
Affiliation:
Instituto Astronômico e Geofísico - USP, Av. Miguel Stefano, 4200, 04301-002 SÃo Paulo, SP Brazil
Sueli M. Viegas
Affiliation:
Instituto Astronômico e Geofísico - USP, Av. Miguel Stefano, 4200, 04301-002 SÃo Paulo, SP Brazil

Extract

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For planetary nebulae, empirical abundances can be obtained from the observed emission-lines as long as the electron density, the electron temperature, and the ionization corrections factor are determined. However, due to temperature fluctuations in the emitting gas, the evaluation of the temperature from the observational data is strongly dependent on the method used. The temperature fluctuation is usually characterized by the mean square temperature fluctuation, t2 (Peimbert and Costero, 1969 — PC).

Type
III. Highlights on the Nebulae
Information
Symposium - International Astronomical Union , Volume 155: Planetary Nebulae , 1993 , pp. 188
Copyright
Copyright © Kluwer 1993 

References

Gruenwald, R.B. and Viegas, S.M. (1992), Ap. J. Suppl. Ser. 78, 153 Google Scholar
Peimbert, M. and Costero, R. (1969), Bol. Obs. Ton. Tac. 6,29 Google Scholar
Stasinska, G. and Tylenda, R. (1986) A.&A. 155,137 Google Scholar