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Chlorine and sulfur in nearby planetary nebulae and H II regions

Published online by Cambridge University Press:  30 August 2012

Mónica Rodríguez  and
Gloria Delgado-Inglada
Mónica Rodríguez
Affiliation:
Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Apdo Postal 51 y 216, 72000 Puebla, Mexico, email: [email protected], [email protected]
Gloria Delgado-Inglada
Affiliation:
Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Apdo Postal 51 y 216, 72000 Puebla, Mexico, email: [email protected], [email protected]
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Abstract

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We derive the chlorine abundances in a sample of nearby planetary nebulae (PNe) and H II regions that have some of the best available spectra. We use a nearly homogeneous procedure to derive the abundance in each object and find that the Cl/H abundance ratio shows similar values in H II regions and PNe. This supports our previous interpretation that the underabundance we found for oxygen in the H II regions is due to the depletion of their oxygen atoms into organic refractory dust components. For other elements, the bias introduced by ionization correction factors in their derived abundances can be very important, as we illustrate here for sulfur using photoionization models. Even for low-ionization PNe, the derived sulfur abundances can be lower than the real ones by up to 0.3 dex, and the differences found with the abundances derived for H II regions that have similar S/H can reach 0.4 dex.

Keywords

H II regionsISM: abundancesplanetary nebulae: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 488 - 489
Copyright
Copyright © International Astronomical Union 2012

References

Ferland, G. J. et al. 1998, PASP, 110, 761 CrossRefGoogle Scholar
Jenkins, E. B. 2009, ApJ, 700, 1299 CrossRefGoogle Scholar
Kingsburgh, R. L. & Barlow, M. J. 1994, MNRAS, 271, 257 Google Scholar
Pauldrach, A. W. A., Hoffmann, T. L., & Lennon, M. 2001, A&A, 375, 161 Google Scholar
Rauch, T. 2003, A&A, 403, 709 Google Scholar
Rodríguez, M. & Delgado-Inglada, G. 2011, ApJ (Letters), 733, L50 CrossRefGoogle Scholar
Stasińska, G. 1978, A&A, 66, 257 Google Scholar
Whittet, D. C. B. 2010, ApJ, 710, 1009 CrossRefGoogle Scholar