Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007pabei..25...22l&link_type=abstract
Progress in Astronomy (ISSN 1000-8349), Vol. 25, No. 1, p. 22 - 35 (2007)
Astronomy and Astrophysics
Astrophysics
Astrophysics, Galaxies, Metallicities, Luminosity(Stellar Mass)-Metallicity Relation, Astrophysics, Galaxies, Review, Luminosity-Metallicity Relation
Scientific paper
The luminosity-metallicity (L-Z) relation (stellar mass-metallicity, mass-Z, relation) is one of the fundamental parameters of galaxies, and can trace the assembly history of metals and stellar masses in the galaxies. The authors review the study progress about (L-Z) and mass-Z relations of galaxies, including the local, the intermediate-z (0.4 < z < 1) and the high-z (z > 2) galaxies. Since the observations extent to a wide cosmic time scale, this can help to understand the evolutionary process of the L-Z relations of galaxies, hence to understand the whole evolutionary scenario of galaxies. In Sect.2 the relations between B-band absolute magnitudes and metallicities (MB-Z) of nearby galaxies are introduced, including the irregular, the spiral galaxies, the UV-selected and nearby HII galaxies, the KISS sample, the 2dFGRS sample, and the SDSS galaxies. Some of the important formulas of such relations are presented. In Sect.3 the study about the relationship between near-infrared J, H, K band absolute magnitudes and metallicities of nearby galaxies are presented. The majority is the result of 400 KISS galaxies obtained from 2MASS. The MK-Z relations of a small sample of distant luminous infrared galaxies is also mentioned. In Sect.4 the relations between stellar mass and metallicities of nearby star-forming galaxies derived from the SDSS database are specially introduced. All these results show that the more luminous (massive) galaxies are more metal-rich generally. The luminosity correlates with metallicity over 10 magnitudes in luminosity and 2 dex in metallicity, with indication that the relationship may be environmental and morphology free. In Sect.5 the L-Z (mass-Z) relations of the intermediate-z and high-z galaxies are introduced. With the increasing ability of observations, more and more distant galaxies have been obtained their L-Z (mass-Z) relations, such as the intermediate-z (0.4 < z < 1) luminous infrared galaxies, the galaxies selected fromm GOODS, CFRS, DGSS fields, and the high-z (z about 3) LBGs. These results show that there exists one L-Z (mass-Z) relation in the distant universe, where the less luminous galaxies may have lower metallicities generally. Especially comparing the L-Z (mass-Z) relations of these distant galaxies with those of the local ones, it shows that the distant ones are more metal-deficient than the local ones at a given luminosity or stellar mass, i.e. the galaxies with 0.4 < z < 1 are about 0.14-0.4 dex more metal-deficient, and the galaxies with z > 2 are about 0.56-0.7 dex more metal-deficient relatively. They should produce these important parts of their metals in the consequent evolutionary process. The conclusions and prospects are given in Sect.6.
Deng Li Cai
Gang Zhao
Hammer Francçois
Liang Yan-Chun
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