Standard Luminosity-Metallicity And Mass-Metallicity Relations For Local Star-Forming Galaxies In The Optical And Infrared

Details Standard Luminosity-Metallicity And Mass-Metallicity Relations For Local Star-Forming Galaxies In The Optical And Infrared Standard Luminosity-Metallicity And Mass-Metallicity Relations For Local Star-Forming Galaxies In The Optical And Infrared

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.9704b&link_type=abstract

American Astronomical Society, AAS Meeting #211, #97.04; Bulletin of the American Astronomical Society, Vol. 39, p.904

Astronomy and Astrophysics

Astronomy

Scientific paper

We explore the luminosity-metallicity (L-Z) and mass-metallicity (M-Z) relations for a sample of 128 local star-forming galaxies. It is thought that galaxian L-Z and M-Z relations evolve with redshift, but direct comparison between studies has been difficult because of the variety of methods used to derive metallicity and the lack of a secure estimate for these relations in the local universe. We evaluate the results of four different strong-line gas phase oxygen abundance calibrations and present local relations with each. We compare luminosities and masses and the ensuing L-Z and M-Z relations derived from optical B-band and Spitzer Infrared Array Camera 4.5 μm photometry. The M-Z relations have similar slopes and scatter in both bandpasses. However, we find that the choice of galaxy formation model used to derive stellar masses from photometric data can cause significant offsets in zero point, further emphasizing the need for uniformity of method in studies of the M-Z relation at various cosmic epochs.

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