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Ultraviolet and Optical Spectra of Central Stars of Halo Planetary Nebulae

Published online by Cambridge University Press:  07 August 2017

M. Peña ,
S. Torres-Peimbert  and
M. T. Ruiz
M. Peña
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. Postal 70 264, 04510 Méx. D.F., México
S. Torres-Peimbert
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. Postal 70 264, 04510 Méx. D.F., México
M. T. Ruiz
Affiliation:
Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile

Abstract

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Optical and UV spectrophotometric data are analyzed for the central stars of the known Population II planetary nebulae. From this, we derive visual magnitudes, spectral classification, color temperatures, luminosities and masses of the objects. It is found that all the stars show absorption type spectrum and most of them have normal H and He photospheric abundances, the only possible exceptions are M 2–29 and GJJC-1 which seem to be H-deficient stars.

Type
II. Highlights on the Nuclei
Information
Symposium - International Astronomical Union , Volume 155: Planetary Nebulae , 1993 , pp. 90
Copyright
Copyright © Kluwer 1993 

References

Maehara, H., Okamura, S, Noguchi, T., He, X-T., Liu, J., Huang, Y.W. and Feng, X.C. (1987) A&A, 178, 221 Google Scholar
Torres-Peimbert, S., Peimbert, M. and Peña, M. (1990) A&A, 233, 540 Google Scholar