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.

引用

页码：29 / 32

页数：4

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