Haro15: Is it actually a low metallicity galaxy?

V. FIRPO; G. BOSCH; G. HÄGELE; A. I. DÍAZ; N. MORRELL

Rio de Janeiro, Brasil

Congreso; XXVII IAU General Assembly; 2009

IAU

We present a detailed study of the physical properties of the nebular material in mul-tiple knots of the blue compact dwarf galaxy Haro 15. Using long slit and echellespectroscopy data, obtained with different instruments at Las Campanas Observatory,we study the physical conditions (electron density and temperature), ionic and totalchemical abundances of several atoms, reddening and ionization structure. The latterwas derived by comparing the oxygen and sulphur ionic ratios to their correspondingobserved emission line ratios (the η and η’ plots) in different regions of the galaxy.Applying direct and empirical methods for abundance determination, we perform acomparative analysis between these regions.