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The Ionization and Thermal Structure of NGC 2392 and NGC 3242

Published online by Cambridge University Press:  07 August 2017

Xiao-Wei Liu  and
John Danziger
Xiao-Wei Liu
Affiliation:
European Southern Observatory, Garching bei München, FRG
John Danziger
Affiliation:
European Southern Observatory, Garching bei München, FRG

Extract

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In Liu and Danziger(1992b) we present Te derived from the Balmer discontinuities for 14 objects by long slit spectrophotometry. It is found that on the average the Te derived in this way are systematically lower than those derived the forbidden line ratios, indicating the presence of large temperature fluctuations(Peimbert 1967, 1971). The spectra obtained have been analyzed point-by-point along the slit for NGC 2392 and NGC 3242, for which t2 = 0.13 and 0.058, respectively, as measured on the summed spectra integrated along the slits.

Type
III. Highlights on the Nebulae
Information
Symposium - International Astronomical Union , Volume 155: Planetary Nebulae , 1993 , pp. 186
Copyright
Copyright © Kluwer 1993 

References

Liu, X. W. and Danziger, J., 1992a, submitted. Google Scholar
Liu, X. W. and Danziger, J., 1992b, to be submitted.Google Scholar
Peimbert, M., 1967, Ap. J. , 150, 825.Google Scholar
Peimbert, M., 1971, Bol. Observ. de Tonantzintla Y Tacubaya , 6, 29.Google Scholar