FIR-Submm Metallicity Diagnostics for High-z Galaxies

被引：0
|
作者：
Nagao, Tohru [1 ,2 ]
Maiolino, Roberto [3 ]
De Breuck, Carlos [4 ]
Caselli, Paola [5 ]
Hatsukade, Bunyo [2 ]
Saigo, Kazuya [6 ]
机构：
[1] Kyoto Univ, Hakubi Ctr Adv Res, Kyoto 6068501, Japan
[2] Kyoto Univ, Grad Sch Sci, Dept Astron, Kyoto 6068501, Japan
[3] Univ Cambridge, Cavendish Lab, Cambridge CB2 1TN, England
[4] European So Observ, London, England
[5] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England
[6] NAOJ, East Asian ALMA Reg Ctr, Hilo, HI USA
来源：
NEW TRENDS IN RADIO ASTRONOMY IN THE ALMA ERA: THE 30TH ANNIVERSARY OF NOBEYAMA RADIO OBSERVATORY | 2013年 / 476卷
关键词：
HIGH-REDSHIFT; SUBMILLIMETER GALAXY; GAS METALLICITY; RADIO GALAXIES; LINE; EVOLUTION; REGIONS; MASS; EMISSION; Z=4.76;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The chemical properties of high-z galaxies provide important information for constraining galaxy evolutionary scenarios. However, optical metallicity diagnostics are unusable for heavily dust-enshrouded galaxies (such as submillimeter galaxies; SMGs), especially at z > 3. Here we focus on the flux ratio of [N tr] 205 mu m/[C 158 mu m to assess the metallicity of high-z SMGs. Through ALMA cycle 0 observations, we have detected the [N 205 mu m emission in a strongly [C II]-emitting SMG, LESS J033229.4-275619 at z = 4.76. The velocity-integrated [N II]/[C a] flux ratio is 0.043 +/- 0.008, that is consistent to the solar metallicity case. This result implies that the chemical evolution has progressed very rapidly in this system.
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页码：29 / 32
页数：4
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