Haro15: Is it actually a low metallicity galaxy?
V. Firpo (1), G. Bosch (1), G. Hagele (1,2), A. I. D\'iaz (2), N., Morrell (3) ((1) Facultad de Ciencias Astron\'omicas y Geof\'isicas,, Universidad Nacional de La Plata, Argentina, (2) Departamento de F\'isica, Te\'orica, C-XI, Universidad Aut\'onoma de Madrid, Spain
TL;DR
This study investigates the physical and chemical properties of the nebular regions in the blue compact dwarf galaxy Haro 15, assessing its metallicity and ionization structure through spectroscopic analysis.
Contribution
It provides a detailed spectroscopic analysis of multiple regions in Haro 15, revealing its physical conditions and chemical abundances, and evaluates its metallicity status.
Findings
Determined electron densities and temperatures across different regions.
Measured ionic and total chemical abundances of key elements.
Compared abundance determination methods to assess metallicity.
Abstract
We present a detailed study of the physical properties of the nebular material in multiple knots of the blue compact dwarf galaxy Haro 15. Using long slit and echelle spectroscopy, obtained at Las Campanas Observatory, we study the physical conditions (electron density and temperature), ionic and total chemical abundances of several atoms, reddening and ionization structure. The latter was derived by comparing the oxygen and sulphur ionic ratios to their corresponding observed emission line ratios (the eta and eta' plots) in different regions of the galaxy. Applying direct and empirical methods for abundance determination, we perform a comparative analysis between these regions.
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