6 papers · 1 filter
Checking the reliability of equivalent width R23 for estimating metallicities of galaxies
Y. C. Liang, F. Hammer, S. Y. Yin
We verify whether the O/H abundances of galaxies can be derived from the equivalent width (EW) R23 instead of the extinction-corrected flux R23, and eventually propose a method of…
The direct oxygen abundances of metal-rich galaxies derived from electron temperature
Y. C. Liang, F. Hammer, S. Y. Yin +3
We aim to derive the electron temperature Te in the gas of metal-rich star-forming galaxies, which can be obtained from their ratios of auroral lines [O II]7320,7330 to nebular lin…
Empirical strong-line oxygen abundance calibrations from galaxies with electron temperature measurements
S. Y. Yin, Y. C. Liang, F. Hammer +4
We determine the gas-phase oxygen abundance for a sample of 695 galaxies and H II regions with reliable detections of [O III]4363, using the temperature-sensitive Te method. Our ai…
The Luminosity and Metallicity Relation of distant luminous infrared galaxies
Y. C. Liang, F. Hammer, H. Flores +4
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 em…
Did most present-day spirals form during the last 8 Gyrs? A formation history with violent episodes revealed by panchromatic observations
F. Hammer, H. Flores, D. Elbaz +3
(abridged) Studies of distant galaxies have shown that ellipticals and large spirals were already in place 8 Gyr ago, leading to a very modest recent star formation in intermediate…
The Luminosity-Metallicity Relation of distant luminous infrared galaxies
Y. C. Liang, F. Hammer, H. Flores +3
One hundred and five 15mu selected objects in three ISO deep survey fields (CFRS 3h, UDSR and UDSF) are studied on the basis of the high quality optical spectra with resolution R>1…