Abundance variations in the planetary nebula A 78

Bibcode
1988A&A...191..128M
Manchado, A.; Mampaso, A.; Pottasch, S. R.
Referencia bibliográfica

Astronomy and Astrophysics (ISSN 0004-6361), vol. 191, no. 1, Feb. 1988, p. 128-136.

Fecha de publicación:
2
1988
Número de autores
3
Número de autores del IAC
2
Número de citas
27
Número de citas referidas
23
Descripción
The authors present long slit low dispersion flux calibrated spectra for the planetary nebula A 78, and from these they obtain the chemical abundances and their variation within the nebula. In the central part of the nebula almost no hydrogen is found implying that the envelope of the central star is burning helium. The authors also measured an over-abundance of processed material which has been convected from the centre of the star. In the outer part of the nebula the abundances are close to solar.
Tipo
Con árbitro
Nebulosas planetarias

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