The abundance discrepancy problem in HII regions
J. Garcia-Rojas (IAC, Spain), C. Esteban (IAC, Spain)
TL;DR
This paper investigates the abundance discrepancy in HII regions, analyzing observational data to evaluate two main explanations: temperature fluctuations and chemical inhomogeneities, advancing understanding of nebular physics.
Contribution
It provides a comparative analysis of the two leading hypotheses explaining the abundance discrepancy in HII regions based on observational data.
Findings
Temperature fluctuations may account for some discrepancies.
Chemically inhomogeneous inclusions are a plausible explanation.
The study highlights the need for further observational tests.
Abstract
The origin of the abundance discrepancy in nebulae is one of the key problems in the physics of photoionized nebulae. In this work we have analized a sample of Galactic and extragalactic H II regions where the abundance discrepancy have been measured, and we discuss the two main scenarios proposed to explain such discrepancy: temperature fluctuations over the observed volume of the nebulae and chemically inhomogeneous inclusions.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Phase Equilibria and Thermodynamics