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Filling factor and temperature variations in planetary nebulae

Published online by Cambridge University Press:  30 August 2012

Manuel Peimbert  and
Antonio Peimbert
Manuel Peimbert
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apartado postal 70-264, México D. F. 4510, México email: [email protected]; [email protected];
Antonio Peimbert
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apartado postal 70-264, México D. F. 4510, México email: [email protected]; [email protected];
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Abstract

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We have found a strong correlation between small filling factors and large t2 values in planetary nebulae. We have also found that in general the filling factor for Type I PNe is smaller than for Type II PNe. These results imply that the abundance correction due to temperature inhomogeneities in general is larger for Type I PNe than for Type II PNe. This difference permits to reproduce the expected abundance difference between PNe of Type I and II predicted by Galactic chemical evolution models.

Keywords

ISM: abundancesplanetary nebulae: general; Galaxy: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 468 - 469
Copyright
Copyright © International Astronomical Union 2012

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