Abundances of KISS Galaxies
نویسندگان
چکیده
We report results from the third in a series of nebular abundance studies of emission-line galaxies from the KPNO International Spectroscopic Survey (KISS). Galaxies with coarse metallicity estimates of 12 + log(O/H) less than 8.2 dex were selected for observation. Spectra of 14 galaxies, which cover the full optical region from [OII]λλ3727,3729 to beyond [SII]λλ6717,6731, are presented, and abundance ratios of N, O, Ne, S, and Ar are computed. The auroral [OIII]λ4363 line is detected in all 14 galaxies. Oxygen abundances determined through the direct electron temperature (Te) method confirm that the sample is metal-poor with 7.61 ≤ 12 + log(O/H) ≤ 8.32. By using these abundances in conjunction with other Te-based measurements from the literature, we demonstrate that H II galaxies and more quiescent dwarf irregular galaxies follow similar metallicity-luminosity (L-Z) relationships. The primary difference is a zero-point
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