Hostname: page-component-745bb68f8f-hvd4g Total loading time: 0 Render date: 2025-01-12T02:02:37.571Z Has data issue: false hasContentIssue false
  • English
  • Français

On the total O/H abundance ratio in Galactic and extragalactic H ii regions

Published online by Cambridge University Press:  23 April 2010

Antonio Peimbert  and
Manuel Peimbert
Antonio Peimbert
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. postal 70-264, México D.F. 04510, Mexico email: antonio@astroscu.unam.mx
Manuel Peimbert
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. postal 70-264, México D.F. 04510, Mexico email: antonio@astroscu.unam.mx
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

To determine the primordial helium abundance and to study the chemical evolution of galaxies it is necessary to derive the total O/H ratio in H ii regions. To determine the total O/H ratio in H ii regions it is necessary to add to the gas-phase component the dust-phase component of O atoms. Based on the Fe/O ratio and other considerations we estimate the dust-phase fraction as a function of O/H.

Keywords

ISM: abundances – H ii regions – galaxies: abundancesevolutionirregular – Galaxy: disk – early universe
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S268: Light Elements in the Universe , November 2009 , pp. 185 - 186
Copyright
Copyright © International Astronomical Union 2010

References

Asplund, M., Grevesse, N., Sauval, A. J., & Scott, P. 2009, ARAA 47, 481Google Scholar
Mesa-Delgado, A., Esteban, C., García-Rojas, J., et al. 2009, MNRAS 395, 855Google Scholar
Pagel, B. E. J. 2009, Nucleosynthesis and Chemical Evolution of Galaxies, Second Edition, Cambridge University PressCrossRefGoogle Scholar
Peimbert, A. & Peimbert, M. 2010a, in preparationGoogle Scholar
Peimbert, M. & Peimbert, A. 2010b, Rev. Mexicana AyA, arXiv: 0912.3781, in pressGoogle Scholar
Przybilla, N., Nieva, M. F., & Butler, K. 2008, ApJ 688, L103Google Scholar