Evolution of oxygen and nitrogen abundances and nitrogen production mechanism in massive star-forming galaxies
Wu YZ(吴玉中); 张双南;Wu, YZ; Zhang, SN
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2013
卷号436期号:1页码:934-942
关键词galaxies: abundances galaxies: starburst galaxies: statistics
学科分类Astronomy & Astrophysics
DOI10.1093/mnras/stt1630
英文摘要Utilizing the observational data of 55 318 star-forming galaxies (SFGs) selected from the catalogue of MPA-JHU emission-line measurements for the Sloan Digital Sky Survey DR8, we investigate the galaxy downsizing effect of their O and N enrichments, and the nitrogen production mechanism in them. We show the redshift evolution of O and N abundances and specific star formation rates for different galaxy mass ranges, demonstrating the galaxy downsizing effect caused by less massive progenitors of less massive galaxies. The O and N abundances do not remain constant for different galaxy mass ranges, and the enrichment (and hence star formation) decreases with increasing galaxy stellar mass. We find evidence of the O enrichment for galaxies with stellar masses M-* > 10(11.0) (in units of M-circle dot), i.e. Delta(log (O/H)) similar to 0.10 and Delta (log (N/H)) similar to 0.28 from redshift 0.023 to 0.30. Based on the evolutionary schematic model of N/O ratios in Coziol et al., who proposed the scheme that the production of nitrogen is the consequence of a sequence of bursts in SFGs, we conclude that the nitrogen production is dominated by the intermediate-mass stars, which dominate the secondary synthesis in SFGs. However, for galaxies with M-* > 10(10.35) we find evidence of enhanced N/O abundance ratios, which are significantly above the secondary synthesis line. This suggests that outflows of massive stars, which deplete oxygen efficiently, are more important in massive galaxies. Finally, we find an excellent linear relation between M-* and log(N/O), indicating that the N/O abundance ratio is a good indicator of the stellar mass in a SFG and may be used as a standard candle for studying cosmology, if confirmed with further studies.
收录类别SCI
WOS记录号WOS:000326435100097
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被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224084
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
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Wu YZ,张双南;Wu, YZ,Zhang, SN. Evolution of oxygen and nitrogen abundances and nitrogen production mechanism in massive star-forming galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,436(1):934-942.
APA 吴玉中,张双南;Wu, YZ,&Zhang, SN.(2013).Evolution of oxygen and nitrogen abundances and nitrogen production mechanism in massive star-forming galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,436(1),934-942.
MLA 吴玉中,et al."Evolution of oxygen and nitrogen abundances and nitrogen production mechanism in massive star-forming galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 436.1(2013):934-942.
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