Gas-phase metallicity of 27 galaxies at intermediate redshift

被引：4
作者：
Morelli, L. [1 ,2 ]
Calvi, V. [1 ,3 ]
Cardullo, A. [1 ]
Pizzella, A. [1 ,2 ]
Corsini, E. M. [1 ,2 ]
Dalla Bonta, E. [1 ,2 ]
机构：
[1] Univ Padua, Dipartimento Fis & Astron G Galilei, Vicolo Osservatorio 3, I-35122 Padua, Italy
[2] INAF Osservatorio Astron Padova, I-35122 Padua, Italy
[3] Space Telescope Sci Inst, Baltimore, MD 21218 USA
来源：
ASTRONOMY & ASTROPHYSICS | 2012年 / 544卷
关键词：
galaxies: distances and redshifts; galaxies: evolution; galaxies: formation; galaxies: fundamental parameters; galaxies: ISM; STAR-FORMING GALAXIES; H-II REGIONS; MASS-METALLICITY; OXYGEN ABUNDANCES; ELECTRON TEMPERATURES; STELLAR POPULATIONS; SOUTHERN GALAXIES; FIELD GALAXIES; HII-REGIONS; EVOLUTION;
D O I：
10.1051/0004-6361/201219316
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Aims. The purpose of this work is to make available new gas-phase oxygen abundance measurements for a serendipitous sample of 27 galaxies with redshifts 0.35 <= z <= 0.52. Methods. We measured the equivalent widths of the [OII]lambda 3727, H beta, and [OIII]lambda lambda 4959, 5007 emission lines observed in the galaxy spectra obtained with the Visible Multi-Object Spectrograph mounted at the Very Large Telescope. For each galaxy, we derived the metallicity-sensitive emission-line ratio R-23, ionization-sensitive emission-line ratio O-32, and gas-phase oxygen abundance 12 + log(O/H). Results. The values of the gas-phase oxygen abundance 12 + log(O/H) that we obtained for all the sample galaxies are consistent with previous findings for galaxies at intermediate redshift.
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页数：6
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