The Luminosity and Metallicity Relation of distant luminous infrared galaxies

Details The Luminosity and Metallicity Relation of distant luminous infrared galaxies The Luminosity and Metallicity Relation of distant luminous infrared galaxies

2005-01-25

arxiv.org/abs/astro-ph/0501529v1

Astronomy and Astrophysics

Astrophysics

7 pages, 2 PS figures, to be published in "Starbursts: From 30 Doradus to Lyman Break Galaxies", held in IoA Cambridge, UK, ed

Scientific paper

Oxygen abundances [12+log(O/H)] in the interstellar medium of a large sample of distant (z>0.4) luminous infrared galaxies (LIRGs) were estimated from their extinction corrected emission-line ratios, on the basis of the VLT/FORS2 spectra with good S/N and moderate resolution. These LIRGs were selected from ISOCAM deep survey fields (CFRS, UDSR, UDSF). They show oxygen abundances ranging from 8.36 to 8.93, with a median value of 8.67, which is 0.5 lower than that of the local bright disks (i.e., L*) at the given magnitude. A significant fraction of distant large disks are indeed LIRGs. Such massive disks could have formed ~50% of their metals and stellar masses since z~1.

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