The Origin of the Mass-Metallicity Relation: Insights from 53,000 Star-forming Galaxies in the Sloan Digital Sky Survey
The Origin of the Mass-Metallicity Relation: Insights from 53,000 Star-forming Galaxies in the Sloan Digital Sky Survey
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DOI：
10.1086/423264
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发表时间：
2004-05
期刊：
影响因子：
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通讯作者：
C. Tremonti;T. Heckman;G. Kauffmann;J. Brinchmann;S. Charlot;S. White;M. Seibert;E. Peng;D. Sc
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文献类型：
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作者：
C. Tremonti;T. Heckman;G. Kauffmann;J. Brinchmann;S. Charlot;S. White;M. Seibert;E. Peng;D. Sc
我们利用斯隆数字巡天成像和光谱的~ 53，000恒星形成星系在z ~ 0.1研究恒星质量和气相金属丰度之间的关系。我们推导出气相氧丰度和恒星质量使用新技术，利用最新的恒星演化合成和光电离模型。我们发现恒星质量和金属丰度之间的紧密（±0.1 dex）相关性跨越恒星质量的3个数量级和金属丰度的10倍。从108.5到1010.5 M的相对陡峭的关系，在良好的雅阁与已知的光度和金属丰度之间的趋势，但高于1010.5 M。我们使用基于Hα光度的气体质量的间接估计，将我们的数据与简单的闭盒化学演化模型的预测进行比较。我们发现，金属损失是强烈的重子质量，与低质量矮星系的5倍以上的金属耗尽比L* 星系在z ~ 0.1。金属耗尽的证据并不局限于矮星系，而是在质量高达1010 M的星系中发现。我们将此解释为银河风无处不在及其有效地从星系势威尔斯中去除金属的有力证据。
We utilize Sloan Digital Sky Survey imaging and spectroscopy of ~53,000 star-forming galaxies at z ~ 0.1 to study the relation between stellar mass and gas-phase metallicity. We derive gas-phase oxygen abundances and stellar masses using new techniques that make use of the latest stellar evolutionary synthesis and photoionization models. We find a tight (±0.1 dex) correlation between stellar mass and metallicity spanning over 3 orders of magnitude in stellar mass and a factor of 10 in metallicity. The relation is relatively steep from 108.5 to 1010.5 M☉ h, in good accord with known trends between luminosity and metallicity, but flattens above 1010.5 M☉. We use indirect estimates of the gas mass based on the Hα luminosity to compare our data to predictions from simple closed box chemical evolution models. We show that metal loss is strongly anticorrelated with baryonic mass, with low-mass dwarf galaxies being 5 times more metal depleted than L* galaxies at z ~ 0.1. Evidence for metal depletion is not confined to dwarf galaxies but is found in galaxies with masses as high as 1010 M☉. We interpret this as strong evidence of both the ubiquity of galactic winds and their effectiveness in removing metals from galaxy potential wells.