Metallicity determination in gas-rich galaxies with semiempirical methods
arXiv:0812.1041 · doi:10.1088/0004-6256/137/1/169
Abstract
A study of the precision of the semiempirical methods used in the determination of the chemical abundances in gas-rich galaxies is carried out. In order to do this the oxygen abundances of a total of 438 galaxies were determined using the electronic temperature, the and the P methods. The new calibration of the P method gives the smaller dispersion for the low and high metallicity regions, while the best numbers in the turnaround region are given by the method. We also found that the dispersion correlates with the metallicity. Finally, it can be said that all the semiempirical methods studied here are quite insensitive to metallicity with a value of dex for more than 50% of the total sample. \keywords{ISM: abundances; (ISM): H {\sc ii} regions}
26 pages, 9 figures and 2 tables. To appear at AJ, January 2009
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