Mapping metals at high redshift with far-infrared lines
Mapping metals at high redshift with far-infrared lines
复制标题
用远红外线绘制高红移金属图
DOI:
10.1093/mnras/stv1788
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发表时间:
2015
影响因子:
4.8
通讯作者:
Pallottini A
中科院分区:
文献类型:
--
作者:
Pallottini A
Cosmic metal enrichment is one of the key physical processes regulating galaxy formation and the evolution of the intergalactic medium (IGM). However, determining the metal content of the most distant galaxies has proven so far almost impossible; also, absorption line experiments atz≳ 6 become increasingly difficult because of instrumental limitations and the paucity of background quasars. With the advent of Atacama Large Millimeter/submillimeter Array (ALMA), far-infrared emission lines provide a novel tool to study early metal enrichment. Among these, the [C $\small {II}$] line at 157.74 μm is the most luminous line emitted by the interstellar medium of galaxies. It can also resonant scatter comic microwave background (CMB) photons inducing characteristic intensity fluctuations (ΔI/ICMB) near the peak of the CMB spectrum, thus allowing to probe the low-density IGM. We compute both [C $\small {II}$] galaxy emission and metal-induced CMB fluctuations atz∼ 6 by using adaptive mesh refinement cosmological hydrodynamical simulations and produce mock observations to be directly compared with ALMA Band 6 data (νobs∼ 272 GHz). The [C $\small {II}$] line flux is correlated withMUVas $\log (F_{\rm peak}/\mu {\rm Jy})= -27.205 -2.253\,M_{\rm UV} -0.038\,M_{\rm UV}^2$. Such relation is in very good agreement with recent ALMA observations ofMUV< −20 galaxies by e.g. Maiolino et al. and Capak et al. We predict that aMUV= −19 (MUV= −18) galaxy can be detected at 4σ in ≃40 (2000) h, respectively. CMB resonant scattering can produce ≃ ± 0.1 μJy/beam emission/absorptions features that are very challenging to be detected with current facilities. The best strategy to detect these signals consists in the stacking of deep ALMA observations pointing fields with knownMUV≃ −19 galaxies. This would allow to simultaneously detect both [C $\small {II}$] emission from galactic reionization sources and CMB fluctuations produced byz∼ 6 metals.
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DOI:
10.1111/j.1365-2966.2008.13035.x
发表时间:
2008
影响因子:
4.8
作者:
S. Salvadori;A. Ferrara;R. S. SissaIsas;InafOaa
通讯作者:
InafOaa
DOI:
10.1088/0004-637x/779/1/87
发表时间:
2013
期刊:
The Astrophysical Journal
影响因子:
--
作者:
C. Churchill;Sebastian Trujillo;N. Nielsen;G. Kacprzak
通讯作者:
G. Kacprzak
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
A. Pallottini;S. Gallerani;A. Ferrara
通讯作者:
A. Ferrara
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
R. Maoli;V. Ferrucci;F. Melchiorri;M. Signore;D. Tosti
通讯作者:
D. Tosti
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
K. Basu
通讯作者:
K. Basu