Significant evolution of the stellar mass-metallicity relation since z ∼ 0.65

被引：0
|
作者：
Liang, Y.C. [1 ,2 ]
Hammer, F. [2 ]
Flores, H. [2 ]
机构：
[1] National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
[2] GEPI, Observatoire de Paris-Meudon, 92195 Meudon, France
来源：
Astronomy and Astrophysics | 1600年 / 447卷 / 01期
关键词：
We present the stellar mass-metallicity relation for 34 0.4 K or stellar mass relative to z = 0. We find no evidence that this discrepancy could be related to different methods used to derive mass and metallicity. Assuming a closed box model predicts a gas fraction converted into stars of 20-25% since z ∼ 0.65; if the gas fraction is 10-20% in present-day galaxies with intermediate masses. This result is in excellent agreement with previous findings that most of the decline of the cosmic star formation density is related to the population of intermediate mass galaxies; which is composed of 75% spirals today. We find no evidence for a change of the slope of the M star-Z relation from z ∼ 0.65 to z = 0 within the intermediate mass range (10.5 < log (M*) < 11.5). © ESO 2006;
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Journal article (JA)
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页码：113 / 119
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