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The systematic uncertainties introduced by atomic data in nebular abundance determinations

Published online by Cambridge University Press:  08 August 2017

Leticia Juan de Dios  and
Mónica Rodríguez
Leticia Juan de Dios
Affiliation:
Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Apdo. Postal 51 y 216, Puebla, Mexico email: leticiajd@inaoep.mx, mrodri@inaoep.mx
Mónica Rodríguez
Affiliation:
Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Apdo. Postal 51 y 216, Puebla, Mexico email: leticiajd@inaoep.mx, mrodri@inaoep.mx
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Abstract

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Atomic data selection is one important source of systematic uncertainty since there are important variations between the values provided by different authors. We explore the effect of using different atomic data in the determination of physical conditions and chemical abundances in a sample of Galactic planetary nebulae and Hii regions. We find that the available datasets introduce significant differences in the results, especially at densities above 104 cm−3, where O/H and N/O reach uncertainties higher than a factor of 4.

Keywords

planetary nebulae: generalISM: abundancesatomic dataH II regions
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S323: Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution , October 2016 , pp. 343 - 344
Copyright
Copyright © International Astronomical Union 2017 

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